Our Commitment

We are committed to providing every customer with the best shopping experience and adhering to many commitments to make you feel at ease and satisfied during the purchase process.

No Fake Pledge

Only a few Diamond Upstairs stores have No Fake Pledge issued by the Intellectual Property Department, allowing consumers to identify honest merchants selling genuine products. Diamania has been operating conscientiously for many years since its opening. It sells countless high-quality diamond jewelry and gives customers 100% confidence.

Price Guarantee

We have close ties with diamond cutting manufacturers in mining areas in various countries, and purchase all primary sources in large quantities, eliminating the need for multiple dealers to profit from it and ensuring the lowest cost. Moreover, the prices are transparent, the profits are extremely low, and we insist on small profits but quick turnover.
Diamania Team is highly experienced and knowledgeable, and can often find diamonds with the best value for money. Because of our excellent prices, we often supply goods to many jewelry retailers and wholesalers.
In most cases, Diamania should have the lowest prices. If you find a diamond of similar quality for sale elsewhere at a lower price, please contact us. We will help examine whether there are hidden problems with the diamond, or explore whether there is room for further price reduction.

Free Professional Consultation

Purchasing a diamond is an important decision and we encourage our guests to learn more before purchasing. Diamania provides free consultation services, and GIA diamond experts personally answer customers' questions. They will never exert sales pressure and hope that customers can choose the diamond that suits them best.

Free Ring Resizing

Diamond rings are often a surprise given to your loved one, and it is difficult to know the exact ring size in advance. After purchasing a diamond ring from Diamania, customers can enjoy a free ring size change service once in the first year.
For the convenience of customers, we have also designed a comparison table of number of turns and diameter.

Free Ring Engraving

Diamania provides free ring engraving service within one year. Make the ring a unique and memorable mark.

Charge Free Credit Card Payment (except installment payment)

In order to provide more convenient payment methods without increasing the burden on customers when purchasing diamonds, we are willing to bear the additional fees charged by banks for payment by credit card.

At the same time, we also provide 12-month interest-free installments with Standard Chartered/AE credit cards to make shopping easier for customers.
The handling fees are as follows:
Standard Chartered Credit Card – 12-month installment plus 3% handling fee
AE Credit Card - 12-month installment plus 2% handling fee. Guests can also apply for other credit card installments by themselves.

Lifetime Warranty

Customers can make an appointment for our after-sales product inspection and ultrasonic cleaning services to keep their jewelry looking new and shiny. If the product is damaged due to wearing, we will only charge the cost price to repair it for the customer.

Diamond Upgrade

Customers of Diamania can trade in GIA natural round diamonds within two years of purchase. 80% of the original price of the diamond (which must be accompanied by a GIA grading certificate,only applicable to round diamonds) can be used to purchase another diamond of a higher price.

Conflict-Free Diamond

GIA is the world's leading authority on diamonds, gemstones and pearls, and is the most rigorous and recognized laboratory for grading. Diamania only sells natural diamonds with their own certificates, which can be verified on the GIA official website.
MiYa Diamond's partners are all large diamond manufacturers with good reputations. They strictly abide by and fulfill the standards established by the Kimberley Process and adopt a zero-tolerance policy for conflict diamonds.