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Diamond deal Costco

There are 10 new Diamond deals available in the Costco weekly ad from 01/09/2026.

Stores 1
Costco
The Home DepotWalgreensHy-VeeKohl'sAlbertsonsBelkSafewayPavilionsFarewayJewel-OscoVonsACMEMariano'sHeinen'sRunnings
10 of 38 deals
Costco
Costco Round brilliant 1.10 ctw diamond earrings and or 0.76 ctw necklace offer
$600 off

Round brilliant 1.10 ctw diamond earrings and or 0.76 ctw necklace

Still valid for 12 days
$2,999.99
$2,399.99
Costco
Costco Garnet and Diamond 14kt Yellow Gold Pendant offer

Garnet and Diamond 14kt Yellow Gold Pendant

Still valid for 2 days
$799.99
Costco
Costco GreenPan Spectra Diamond 3-piece Frypan Set offer

GreenPan Spectra Diamond 3-piece Frypan Set

Still valid for 2 days
$169.99
Costco
Costco Round Brilliant 1.22 ctw VS2 Clarity, I Color Diamond Platinum Wedding Set offer

Round Brilliant 1.22 ctw VS2 Clarity, I Color Diamond Platinum Wedding Set

Still valid for 2 days
$3,299.99
Costco
Costco Round Brilliant 1.65 ct VVS1 Clarity, D Color Diamond Platinum Solitaire Ring offer

Round Brilliant 1.65 ct VVS1 Clarity, D Color Diamond Platinum Solitaire Ring

Still valid for 2 days
$26,999.99
Costco
Costco Multi Cut 25.52 ctw VS2 Clarity, H Color Diamond 18kt White Gold Necklace offer

Multi Cut 25.52 ctw VS2 Clarity, H Color Diamond 18kt White Gold Necklace

Still valid for 2 days
$34,999.99
Costco
Costco Round Brilliant 0.83 ctw VS2 Clarity, I Color Diamond 14kt White Gold Men's Ring offer

Round Brilliant 0.83 ctw VS2 Clarity, I Color Diamond 14kt White Gold Men's Ring

Still valid for 2 days
$2,499.99
Costco
Costco Round Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop Earrings offer

Round Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop Earrings

Still valid for 2 days
$12,999.99
Costco
Costco Oval & Round Brilliant 14.19 ctw VS2 Clarity, I Color Diamond 18kt White Gold Necklace offer

Oval & Round Brilliant 14.19 ctw VS2 Clarity, I Color Diamond 18kt White Gold Necklace

Still valid for 2 days
$34,999.99
Costco
Costco Round Brilliant 0.60 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud Earrings offer

Round Brilliant 0.60 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud Earrings

Still valid for 2 days
$999.99

Related brands

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Diamond logo
Diamond
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Dove
Hershey's logo
Hershey's
Kellogg's logo
Kellogg's
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Candy
Big logo
Big

Stores with Diamond in their assortment

Costco

Costco

Kohl's

Kohl's

Safeway

Safeway

Belk

Belk

Runnings

Runnings

Albertsons

Albertsons

Jewel-Osco

Jewel-Osco

The Home Depot

The Home Depot

Walgreens

Walgreens

Pavilions

Pavilions

Vons

Vons

ACME

ACME

Fareway

Fareway

Hy-Vee

Hy-Vee

Mariano's

Mariano's

JC Penney

JC Penney

Walmart

Walmart

ShopRite

ShopRite

Five Below

Five Below

Claire's

Claire's

Littman Jewelers

Littman Jewelers

Menards

Menards

Ace Hardware

Ace Hardware

Haggen Food

Haggen Food

Nearest Costco branch

This Diamond deal Costco is available in the following branches based on your set location:

New York
Automatically locate
Costco logo
Costco976 3rd ave 11232-2400 New York
6.60 km
Costco logo
Costco3250 vernon blvd 11106-4927 Long Island City NY
7.85 km
Costco logo
Costco517 e 117th st 10035-4409 Harlem NY
10.95 km
All locations

Diamond price Costco🕒

OfferNameStoreRegular priceDeal pricePromotionStart dateEnd date
Costco Round Brilliant 0.83 ctw VS2 Clarity, I Color Diamond 14kt White Gold Men's Ring offerRound Brilliant 0.83 ctw VS2 Clarity, I Color Diamond 14kt White Gold Men's RingCostco$2,499.9905 January 202611 January 2026
Costco Round Brilliant 0.60 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud Earrings offerRound Brilliant 0.60 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud EarringsCostco$999.9905 January 202611 January 2026
Costco Round Brilliant 1.65 ct VVS1 Clarity, D Color Diamond Platinum Solitaire Ring offerRound Brilliant 1.65 ct VVS1 Clarity, D Color Diamond Platinum Solitaire RingCostco$26,999.9905 January 202611 January 2026
Costco Oval & Round Brilliant 14.19 ctw VS2 Clarity, I Color Diamond 18kt White Gold Necklace offerOval & Round Brilliant 14.19 ctw VS2 Clarity, I Color Diamond 18kt White Gold NecklaceCostco$34,999.9905 January 202611 January 2026
Costco Round Brilliant 1.22 ctw VS2 Clarity, I Color Diamond Platinum Wedding Set offerRound Brilliant 1.22 ctw VS2 Clarity, I Color Diamond Platinum Wedding SetCostco$3,299.9905 January 202611 January 2026
Costco Round Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop Earrings offerRound Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop EarringsCostco$12,999.9905 January 202611 January 2026
Costco Garnet and Diamond 14kt Yellow Gold Pendant offerGarnet and Diamond 14kt Yellow Gold PendantCostco$799.9905 January 202611 January 2026
Costco GreenPan Spectra Diamond 3-piece Frypan Set offerGreenPan Spectra Diamond 3-piece Frypan SetCostco$169.9905 January 202611 January 2026
Costco Round Brilliant 1.76 ctw VVS2 Clarity, D Color Diamond Platinum Halo Ring offerRound Brilliant 1.76 ctw VVS2 Clarity, D Color Diamond Platinum Halo RingCostco$13,999.9930 December 202504 January 2026
Costco Round Brilliant 1.07 ct VVS2 Clarity, H Color Diamond Platinum Solitaire Ring offerRound Brilliant 1.07 ct VVS2 Clarity, H Color Diamond Platinum Solitaire RingCostco$6,999.9930 December 202504 January 2026
Costco Radiant Cut 2.02 ct VS2 Clarity, F Color Diamond Platinum Solitaire Ring offerRadiant Cut 2.02 ct VS2 Clarity, F Color Diamond Platinum Solitaire RingCostco$22,999.9922 December 202528 December 2025
Costco Cushion Cut 1.80 ct VVS2 Clarity, D Color Diamond Platinum Solitaire Ring offerCushion Cut 1.80 ct VVS2 Clarity, D Color Diamond Platinum Solitaire RingCostco$24,999.9922 December 202528 December 2025
Costco Round Brilliant 12.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Strand Necklace offerRound Brilliant 12.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Strand NecklaceCostco$13,999.9922 December 202528 December 2025
Costco Cushion Cut 3.01 ct VS2 Clarity, G Color Diamond Platinum Solitaire Ring offerCushion Cut 3.01 ct VS2 Clarity, G Color Diamond Platinum Solitaire RingCostco$46,999.9922 December 202528 December 2025
Costco Round Brilliant 8.00 ctw VS2 Clarity, I Color Diamond 14kt Gold Tennis Bracelet offerRound Brilliant 8.00 ctw VS2 Clarity, I Color Diamond 14kt Gold Tennis BraceletCostco$7,999.9922 December 202528 December 2025
Costco Round Brilliant 1.20 ctw VS2 Clarity, I Color Diamond Platinum Three Stone Ring offerRound Brilliant 1.20 ctw VS2 Clarity, I Color Diamond Platinum Three Stone RingCostco$2,399.9722 December 202528 December 2025
Costco Princess Cut 0.73 ctw VS2 Clarity, G Color Diamond 14kt Gold Stud Earrings offerPrincess Cut 0.73 ctw VS2 Clarity, G Color Diamond 14kt Gold Stud EarringsCostco$999.9922 December 202528 December 2025
Costco Round Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop Earrings offerRound Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop EarringsCostco$12,999.9915 December 202521 December 2025
Costco Garnet and Diamond 14kt Yellow Gold Ring offerGarnet and Diamond 14kt Yellow Gold RingCostco$1,699.9915 December 202521 December 2025
Costco Princess Cut 1.71 ctw VS2 Clarity, I Color Diamond Platinum Ring offerPrincess Cut 1.71 ctw VS2 Clarity, I Color Diamond Platinum RingCostco$5,499.9715 December 202521 December 2025
Costco Round Brilliant 0.36 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud Earrings offerRound Brilliant 0.36 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud EarringsCostco$399.9915 December 202521 December 2025
Costco Round Brilliant 0.35 ctw VS2 Clarity, I Color Diamond 14kt Gold Hoop Earrings offerRound Brilliant 0.35 ctw VS2 Clarity, I Color Diamond 14kt Gold Hoop EarringsCostco$499.9915 December 202521 December 2025
Costco Cushion Cut 1.80 ct VVS2 Clarity, D Color Diamond Platinum Solitaire Ring offerCushion Cut 1.80 ct VVS2 Clarity, D Color Diamond Platinum Solitaire RingCostco$24,999.9915 December 202521 December 2025
Costco 14kt Yellow Gold High Polish & Diamond Cut Round Box offer14kt Yellow Gold High Polish & Diamond Cut Round BoxCostco$1,099.9908 December 202514 December 2025
Costco Round Brilliant 0.80 ctw VS2 Clarity, I Color Solitaire Diamond 14kt White Gold Stud Earrings offerRound Brilliant 0.80 ctw VS2 Clarity, I Color Solitaire Diamond 14kt White Gold Stud EarringsCostco$1,199.9908 December 202514 December 2025
Costco Round Brilliant 0.14 ctw VS2 Clarity, I Color Diamond 14kt Gold Necklace offerRound Brilliant 0.14 ctw VS2 Clarity, I Color Diamond 14kt Gold NecklaceCostco$499.9908 December 202514 December 2025
Costco 14kt Gold Diamond Cut Round Box Chain offer14kt Gold Diamond Cut Round Box ChainCostco$369.9908 December 202514 December 2025
Costco Lab Created Emerald and Diamond 14kt White Gold Pendant offerLab Created Emerald and Diamond 14kt White Gold PendantCostco$699.9901 December 202507 December 2025
Costco Round Brilliant 4.00 ctw VS2 Clarity, I Color Diamond Eternity Band offerRound Brilliant 4.00 ctw VS2 Clarity, I Color Diamond Eternity BandCostco$4,499.9901 December 202507 December 2025
Costco Round Brilliant 1.50 ctw VS2 Clarity, I Color Diamond Platinum Ring offerRound Brilliant 1.50 ctw VS2 Clarity, I Color Diamond Platinum RingCostco$4,199.9901 December 202507 December 2025
Costco Round Brilliant 5.00 ctw VS2 Clarity, G Color Diamond 14kt Gold Strand Necklace offerRound Brilliant 5.00 ctw VS2 Clarity, G Color Diamond 14kt Gold Strand NecklaceCostco$4,999.9901 December 202507 December 2025
Costco Round Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum Band offerRound Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum BandCostco$3,999.9901 December 202507 December 2025
Costco Round Brilliant 1.00 ctw VS2 Clarity, I Color Diamond 14kt White Gold Earrings offerRound Brilliant 1.00 ctw VS2 Clarity, I Color Diamond 14kt White Gold EarringsCostco$799.9901 December 202507 December 2025
Costco Round Brilliant 3.00 ctw VS2 Clarity, I Color Diamond Platinum Wedding Set offerRound Brilliant 3.00 ctw VS2 Clarity, I Color Diamond Platinum Wedding SetCostco$6,999.9901 December 202507 December 2025
Costco Round Brilliant 2.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Eternity Band offerRound Brilliant 2.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Eternity BandCostco$2,499.9901 December 202507 December 2025
Costco Blue Sapphire and Diamond 14kt White Gold Earrings offerBlue Sapphire and Diamond 14kt White Gold EarringsCostco$899.9901 December 202507 December 2025
Costco Amethyst and Diamond 14kt White Gold Bar Necklace offerAmethyst and Diamond 14kt White Gold Bar NecklaceCostco$349.9901 December 202507 December 2025
Costco Round Brilliant 2.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Eternity Band offerRound Brilliant 2.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Eternity BandCostco$1,999.9928 November 202530 November 2025
Costco Round Brilliant 1.50 ctw VS2 Clarity, I Color Diamond 14kt White Gold Double Halo Earrings offerRound Brilliant 1.50 ctw VS2 Clarity, I Color Diamond 14kt White Gold Double Halo EarringsCostco$1,599.9928 November 202530 November 2025
Costco Round Brilliant 8.00 ctw VS2 Clarity, I Color Diamond 14kt Gold Tennis Bracelet offerRound Brilliant 8.00 ctw VS2 Clarity, I Color Diamond 14kt Gold Tennis BraceletCostco$6,999.9928 November 202530 November 2025
Costco Round Brilliant 4.00 ctw VS2 Clarity, I Color Diamond Eternity Band offerRound Brilliant 4.00 ctw VS2 Clarity, I Color Diamond Eternity BandCostco$4,499.9928 November 202530 November 2025
Costco Blue Sapphire and Diamond 14kt White Gold Earrings offerBlue Sapphire and Diamond 14kt White Gold EarringsCostco$899.9928 November 202530 November 2025
Costco Round Brilliant 1.30 ctw VS2 Clarity, G Color Diamond 18kt White Gold Halo Necklace offerRound Brilliant 1.30 ctw VS2 Clarity, G Color Diamond 18kt White Gold Halo NecklaceCostco$5,499.9928 November 202530 November 2025
Costco Round Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum Band offerRound Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum BandCostco$3,999.9928 November 202530 November 2025
Costco Round Brilliant 0.36 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud Earrings offerRound Brilliant 0.36 ctw VS2 Clarity, I Color Diamond 14kt White Gold Stud EarringsCostco$399.9928 November 202530 November 2025
Costco Round Brilliant 5.00 ctw VS2 Clarity, G Color Diamond 14kt Gold Strand Necklace offerRound Brilliant 5.00 ctw VS2 Clarity, G Color Diamond 14kt Gold Strand NecklaceCostco$4,999.9928 November 202530 November 2025
Costco Round Brilliant 1.00 ctw VS2 Clarity, I Color Diamond 14kt White Gold Earrings offerRound Brilliant 1.00 ctw VS2 Clarity, I Color Diamond 14kt White Gold EarringsCostco$799.9928 November 202530 November 2025
Costco Round Brilliant 0.50 ctw VS2 Clarity, I Color Diamond 14kt Gold Hoop Earrings offerRound Brilliant 0.50 ctw VS2 Clarity, I Color Diamond 14kt Gold Hoop EarringsCostco$549.9928 November 202530 November 2025
Costco Round Brilliant 0.15 ctw VS2 Clarity, I Color Diamond 14kt Gold Heart Pendant offerRound Brilliant 0.15 ctw VS2 Clarity, I Color Diamond 14kt Gold Heart PendantCostco$449.9924 November 202527 November 2025
Costco Round Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop Earrings offerRound Brilliant 7.00 ctw VS2 Clarity, I Color Diamond 18kt White Gold Hoop EarringsCostco$12,999.9924 November 202527 November 2025
Costco Montacute Hand Knotted Rug Collection, Diamond Medallion Redfield Red offerMontacute Hand Knotted Rug Collection, Diamond Medallion Redfield RedCostco$349.9917 November 202523 November 2025
Costco Princess Cut 0.73 ctw VS2 Clarity, G Color Diamond 14kt Gold Stud Earrings offerPrincess Cut 0.73 ctw VS2 Clarity, G Color Diamond 14kt Gold Stud EarringsCostco$999.9917 November 202523 November 2025
Costco Round Brilliant 2.00 ctw VVS2 Clarity, H Color Diamond Platinum Stud Earrings offerRound Brilliant 2.00 ctw VVS2 Clarity, H Color Diamond Platinum Stud EarringsCostco$12,999.9917 November 202523 November 2025
Costco Round Brilliant 1.00 ctw VS2 Clarity, I Color Diamond 14kt Gold Three Stone Pendant offerRound Brilliant 1.00 ctw VS2 Clarity, I Color Diamond 14kt Gold Three Stone PendantCostco$1,499.9910 November 202516 November 2025
Costco Princess Cut 0.73 ctw VS2 Clarity, G Color Diamond 14kt Gold Stud Earrings offerPrincess Cut 0.73 ctw VS2 Clarity, G Color Diamond 14kt Gold Stud EarringsCostco$999.9910 November 202516 November 2025
Costco G.A. Gertmenian & Sons Montacute Hand Knotted Rug Collection, Diamond Medallion Redfield Red offerG.A. Gertmenian & Sons Montacute Hand Knotted Rug Collection, Diamond Medallion Redfield RedCostco$4,699.9910 November 202516 November 2025
Costco Round Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum Band offerRound Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum BandCostco$4,799.9910 November 202516 November 2025
Costco Round Brilliant 1.30 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Bar Necklace offerRound Brilliant 1.30 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Bar NecklaceCostco$1,599.9910 November 202516 November 2025
Costco Round Brilliant 2.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Eternity Band offerRound Brilliant 2.00 ctw VS2 Clarity, G Color Diamond 14kt White Gold Eternity BandCostco$1,999.9910 November 202516 November 2025
Costco 14kt Yellow Gold High Polish & Diamond Cut Round Box Chain offer14kt Yellow Gold High Polish & Diamond Cut Round Box ChainCostco$1,299.9910 November 202516 November 2025
Costco Round Brilliant 0.14 ctw VS2 Clarity, I Color Diamond 14kt Gold Necklace offerRound Brilliant 0.14 ctw VS2 Clarity, I Color Diamond 14kt Gold NecklaceCostco$449.9910 November 202516 November 2025
Costco Round Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac Pendant offerRound Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac PendantCostco$599.9710 November 202516 November 2025
Costco Round Brilliant 0.90 ctw VS2 Clarity, I Color Diamond 14kt Gold Band offerRound Brilliant 0.90 ctw VS2 Clarity, I Color Diamond 14kt Gold BandCostco$999.9903 November 202509 November 2025
Costco Oval Cut 8 x 6 mm Morganite & Diamond 14kt White Gold Bracelet offerOval Cut 8 x 6 mm Morganite & Diamond 14kt White Gold BraceletCostco$10,499.9903 November 202509 November 2025
Costco Emerald & Round Brilliant 1.39 ctw VS2 Clarity, I Color Diamond 14kt White Gold Ring offerEmerald & Round Brilliant 1.39 ctw VS2 Clarity, I Color Diamond 14kt White Gold RingCostco$1,999.9903 November 202509 November 2025
Costco Round Brilliant 1.00 ct VS2 Clarity, I Color Diamond Solitaire Ring offerRound Brilliant 1.00 ct VS2 Clarity, I Color Diamond Solitaire RingCostco$3,999.9903 November 202509 November 2025
Costco Round Brilliant 1.40 ctw VS2 Clarity, I Color Diamond 14kt White Gold Wedding Set offerRound Brilliant 1.40 ctw VS2 Clarity, I Color Diamond 14kt White Gold Wedding SetCostco$2,199.9903 November 202509 November 2025
Costco 4mm Comfort Fit Diamond Cut and High Polish Beveled Edge Wedding Band offer4mm Comfort Fit Diamond Cut and High Polish Beveled Edge Wedding BandCostco$284.9903 November 202509 November 2025
Costco Round Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum Band offerRound Brilliant 2.50 ctw VS2 Clarity, I Color Diamond Platinum BandCostco$4,799.9903 November 202509 November 2025
Costco Round Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac Pendant offerRound Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac PendantCostco$599.9703 November 202509 November 2025
Costco Round Brilliant 1.28 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Band offerRound Brilliant 1.28 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold BandCostco$1,499.9903 November 202509 November 2025
Costco Round Brilliant 0.75 ctw VS2 Clarity, G Color Diamond 14kt White Gold Ring offerRound Brilliant 0.75 ctw VS2 Clarity, G Color Diamond 14kt White Gold RingCostco$1,099.9903 November 202509 November 2025
Costco London Blue Topaz and Diamond 14kt White Gold Ring offerLondon Blue Topaz and Diamond 14kt White Gold RingCostco$749.9903 November 202509 November 2025
Costco Round Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac Pendant offerRound Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac PendantCostco$599.9727 October 202502 November 2025
Costco Oval Cut 8 x 6 mm Morganite & Diamond 14kt White Gold Bracelet offerOval Cut 8 x 6 mm Morganite & Diamond 14kt White Gold BraceletCostco$10,499.9927 October 202502 November 2025
Costco Round Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac Pendant offerRound Brilliant 0.20 ctw VS2 Clarity, I Color Diamond 14kt Yellow Gold Zodiac PendantCostco$599.9720 October 202526 October 2025
Costco Bulova Classic Diamond Malachite Stainless Steel Quartz Women's Watch, 34mm offerBulova Classic Diamond Malachite Stainless Steel Quartz Women's Watch, 34mmCostco$349.9920 October 202526 October 2025
Costco Emerald Cut 2.46 ctw VVS2 Clarity, H Color Diamond Platinum Wedding Set offerEmerald Cut 2.46 ctw VVS2 Clarity, H Color Diamond Platinum Wedding SetCostco$14,999.9914 October 202519 October 2025
Costco Round Brilliant 1.30 ct VS1 Clarity, D Color Diamond Platinum Solitaire Ring offerRound Brilliant 1.30 ct VS1 Clarity, D Color Diamond Platinum Solitaire RingCostco$10,999.9914 October 202519 October 2025
Costco 14kt Yellow Gold Diamond Cut Hoop Earrings offer14kt Yellow Gold Diamond Cut Hoop EarringsCostco$199.9722 September 202528 September 2025
Costco Amethyst and Diamond 14kt White Gold Bar Necklace offerAmethyst and Diamond 14kt White Gold Bar NecklaceCostco$479.9907 July 202513 July 2025
Costco Round Brilliant 1.10 ctw VS2 Clarity, I Color Diamond 14kt White Gold Wedding Set offerRound Brilliant 1.10 ctw VS2 Clarity, I Color Diamond 14kt White Gold Wedding SetCostco$1,699.9902 July 202506 July 2025
Costco Round Brilliant 5.00 ctw VS2 Clarity, G Color Diamond Platinum Double Row Eternity Band offerRound Brilliant 5.00 ctw VS2 Clarity, G Color Diamond Platinum Double Row Eternity BandCostco$4,999.9703 January 202509 January 2025
Costco NewAge Performance Diamond Plate Series Garage Cabinets 7-piece Set offerNewAge Performance Diamond Plate Series Garage Cabinets 7-piece SetCostco$1,499.99$1,199.99$300.00 Discount13 December 202419 December 2024
Costco Round Brilliant 5.00 ctw VS2 Clarity, G Color Diamond Platinum offerRound Brilliant 5.00 ctw VS2 Clarity, G Color Diamond PlatinumCostco$4,999.9715 November 202421 November 2024
Costco 14kt Gold Diamond Cut Round Box Chain offer14kt Gold Diamond Cut Round Box ChainCostco$269.9913 September 202419 September 2024
Costco 14kt Yellow Gold Diamond Cut Huggie Hoop Earring offer14kt Yellow Gold Diamond Cut Huggie Hoop EarringCostco$289.9926 July 202401 August 2024
Costco Anji Mountain Woven Diamond Pouf offerAnji Mountain Woven Diamond PoufCostco$69.9912 July 202418 July 2024
Costco Anji Mountain Woven Diamond Pouf offerAnji Mountain Woven Diamond PoufCostco$69.9927 June 202425 July 2024
Costco Round Brillant 1.20 ctw VS2 Clarity,I Color Diamond Platinum.... offerRound Brillant 1.20 ctw VS2 Clarity,I Color Diamond Platinum....Costco$4,999.9715 February 202422 February 2024
Costco Colorado clothing men's diamond quilted jacket offerColorado clothing men's diamond quilted jacketCostco$21.9915 December 202320 December 2023
Costco Round brilliant 3.00 ctw vs2 clarity, i color diamond eternity band offerRound brilliant 3.00 ctw vs2 clarity, i color diamond eternity bandCostco$3,399.9908 December 202314 December 2023
Costco London blue topaz and diamond 14kt white gold ring offerLondon blue topaz and diamond 14kt white gold ringCostco$749.9908 December 202314 December 2023
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Costco Diamond deal

At Costco, you’ll find a wide selection and range of ⭐️Diamond deals⭐️. This week, Costco has 10 Diamond deals in the weekly ad. Remove your filters to view all Diamond deals, find the best prices, and save on your next purchase. Use the filters to find the deals of your favourite shop or product to make your purchases as cheap as possible, for the lowest price. You can save your search to stay updated when Diamond is on deal again in this or next week’s weekly ad. Is the product not on promotion now but still needed? Check out similar deals to find an alternative.

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Last update: Wednesday, January 7, 2026
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