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Due to the nature of this product you cannot ‘Add to Basket’ & checkout from this page. If you want to purchase this item please email diamonds@costco.co.uk and we will contact you to arrange payment & shipping.
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Your estimated delivery time will be 14 business days (excluding weekends and bank holidays) from the time of order. Postcode Restrictions may apply. Find out more in the Delivery & Returns Tab below.

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  • Gemstone Type: Blue Sapphire
  • Gemstone Shape: Oval Cut
  • Gemstone Weight: Approximately 6.91ct
  • Gemstone Size: 11.75 x 9.46 x 6.89mm
  • Total Diamond Weight: 1.32ctw
  • Diamond Clarity: VS1 / VS2
  • Diamond Shape: Round Brilliant Cut
  • Metal: 18ct White Gold
  • Ring Size: N, sizeable within one size

Costco makes purchasing the highest quality diamonds easy by offering the industry's very best diamonds at the lowest possible price. Our long-standing relationship with a number of approved suppliers guarantees we get the best selection of stones on the market.

Costco's experienced buying team works closely with these suppliers to evaluate and hand-select each diamond for its quality and brilliance. Our team of Graduate Gemologists then inspect every diamond to ensure it meets the strictest quality standards; this includes a thorough examination of cut, colour, clarity, and craftsmanship. This way you can be confident your purchase is as special to us as it is to you.

This item comes with a Summation Of Appraisal certificate from the International Gemological Institute (IGI). This is to certify that the item described above is genuine, and has been independently examined in the laboratories of IGI.

Also included with this diamond is a GIA (Gemological Institute of America), Gem Trade Laboratory, Diamond Grading Report. Gem Trade Laboratory is a division of GIA Enterprises, Inc., a wholly owned subsidiary of the non-profit Gemological Institute of America, Inc. This describes the characteristics of the diamond at the time of the examination based upon 10 x magnification. 

When returning unique jewellery items, or items containing a 1.00ct centre diamond or larger, costco.co.uk may require additional time to verify the diamond, in which case a refund will be approved upon positive verification and as long as the item is not damaged or changed in any way (i.e. resized or reset). This process may require two to five business days. 

For any enquiries please email diamonds@costco.co.uk 

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