On international orders, the customer is responsible for all additional duties, taxes and/or tariffs that might incur. 

All shipments must be made to a physical address with an adult present to sign for the package.

We do not offer free return shipping on international orders. 

International customers are responsible for insured returned shipments, as well as all duties/taxes/tariffs that Gemma Amans might incur by receiving the return.

Some of our items are accompanied by a lab report, but not all. It will be clearly stated if there is a report with a particular item. We do not go out of our way to remove diamonds from their settings to obtain GIA reports unless we feel it is absolutely necessary as we like to maintain the original quality of our pieces. We guarantee our grading and grade our diamonds according to GIA standards.

All our diamond grading is done by GIA graduate gemologists and at least one gemologists look at each piece. 

We are pleased to offer a layaway option to make purchasing your dream piece easier. Please read our layaway terms carefully before committing:

• A 25% non-refundable deposit is required to start the layaway plan.

• The remaining balance must be paid in full within the agreed period (typically within 3-12  months, unless otherwise stated).

• Payments can be made in installments according to the schedule we set together.

• If the layaway plan is cancelled by the buyer for any reason, a 25% restocking fee will be applied, and the initial deposit will be forfeited.

• If the final payment is not received within the agreed time frame, the layaway will be considered cancelled, and the item will be returned to stock.

• Layaway items are reserved exclusively for you and are not eligible for returns, exchanges, or refunds.

By initiating a layaway plan, you agree to all of the above terms.

We offer several secure payment options:

• Bank transfer / Wise

• Stripe (credit & debit cards – available for Switzerland, Austria, and Germany)

• PostFinance payment

For orders from other countries, please choose Bank transfer / Wise and contact us for payment details.
Your order will be carefully prepared and shipped once the payment has been received.

Gemma Amans uses its knowledge to date each piece based on materials, hallmarks/signatures, overall style and cultural context. While dating and authenticity are not a formal science, we determine them to the best of our ability based on our knowledge, experience and resources. Some of our pieces are mounted in a way that makes it difficult to determine a precise stone’s grading. Diamonds and colored gemstones that cannot be removed from their antiques settings without harm to the piece are evaluated in their mountings using industry-standard measurements and formulas. Unless certified by an independent lab, stone gradings are done by us. 

Jewelry descriptions and all carat weights stated represent approximates. 

All diamonds shown on our website are natural, untreated diamonds. 

We cannot guarantee that the color you see matches the item color, as the display of color depends, in part, upon the type of computer monitor used to observe the image.