Terms and Conditions


We at Mystery Diamonds provide you with the Largest Selection of lab-grown diamonds at very Competitive Prices that are in super high demand. Therefore, it is very important to follow our policy and expectations.


  • We can provide you with a 10-business day memo. High demand items may have shorter memo days. Clients will be notified before shipping.



  • Return up to 30 days on the day of invoice
  • Additional 60 up to 90 days to accept a stone back not as a return but as an exchange
  • For the exchange, only allowed 1 per item sold


  • Upgrade available per individual stone
  • Providing upgraded item at least double in value
  • Specialty* items are not eligible for return, exchange, or upgrade

 *Specialty Items

  • This specialty item will be disclosed before any transaction with the retailer
  • No exchanges or returns for specialty orders
  • Not eligible for return


  • We cover overnight shipment cost from our office to your store. International shipment cost is covered if the total amount is greater than $3,000. Returned stones should be shipped back with the express shipping method! Due to operational problems, Mystery Diamond cannot accept USPS packages that are not express!


  • Sold stones that return to the Mystery Diamond office should be returned with a certificate. Re-ordering lost certificates will cost $60 + shipping cost.


  • Mystery Diamond expect timely payments net thirty days from invoice date. Customer agrees to pay a charge on the amount past due at the rate of 1.5% per month (18% per year) or the maximum lawful rate, whichever is less.