Costco makes purchasing quality jewellery easy by offering only the industry's highest quality diamonds at the lowest possible price. Costco's experienced buying team works with our suppliers to select timeless styles and create well–crafted and comfortable jewellery. An Independent Gemologist inspects each piece for quality craftsmanship and every diamond for cut, colour and clarity to ensure your jewellery will sparkle for generations.
We guarantee that all diamonds supplied by costco.co.uk are as follows: Clarity to be VS2 or better and colour to be "I" or better as outlined on the industry grading guide.
To view additional jewellery information click here.
Delivery will take place via UPS insured. The estimated delivery time will be 5 to 10 business days from the time of order.
UPS tracking will be available 5 days following receipt of your order.
Additional day(s) transit may be required for remote areas.
These deliveries will require an adult signature.
Please note that we are currently unable to ship to the Channel Islands, Post Office boxes and BFPO.
Public and Regional holidays may affect delivery lead times.
Delivery times may vary in the event of adverse weather conditions.
Gift messaging is available during the checkout process.
We guarantee your satisfaction and want you to be happy with your purchase. If you wish to return an item or you would like to contact us, simply call our freephone number 0800 0324 324.
Please pack your parcel up securely, preferably using its original packaging, but removing the delivery label.
If the item arrived to you in a box, it will need to be in a box at the time of pick up.
In the case of jewellery items, refunds under the Costco Customer Satisfaction Guarantee and Refunds Policy will be subject to our positive verification of the item. Such refunds are also conditional on the item not having been damaged or changed in any way (i.e. resized or reset). This process may require seven to ten business days.
We regret that we cannot accept and process online purchase returns at any Costco Warehouses.