Precious Gemstones
About OGS Antwerp
A family gemstone business buying at the source and cutting in Antwerp.
OGS Antwerp is a family gemstone business. We buy rough and finished stones at the source in Chanthaburi, Peshawar and Bogota, bring them back to Antwerp, and put every one through the same process: cut or recut where it will improve the stone, photograph it under controlled light, and send it for an independent laboratory report.
We only sell what we own. Every stone on this site is in our safe in Antwerp, has been weighed and measured by us, and is photographed as it actually looks rather than as a stock image.
What that means for you:
Nothing is listed without a laboratory report or, for smaller stones, our own written grading. Treatment is disclosed in full on every product page, including the treatments the trade often leaves unsaid.
Prices are what we would quote you across a desk. We buy directly, so there is no importer margin between the mine and this page.
Every gem ships fully insured, with tracking, and comes with fourteen days to return it for any reason at all.
If you are looking for something specific — a matched pair, a particular colour, a calibrated size for a setting you already own — write to us. Most of our best stones are found for a customer rather than found by one.
We only sell what we own. Every stone on this site is in our safe in Antwerp, has been weighed and measured by us, and is photographed as it actually looks rather than as a stock image.
What that means for you:
Nothing is listed without a laboratory report or, for smaller stones, our own written grading. Treatment is disclosed in full on every product page, including the treatments the trade often leaves unsaid.
Prices are what we would quote you across a desk. We buy directly, so there is no importer margin between the mine and this page.
Every gem ships fully insured, with tracking, and comes with fourteen days to return it for any reason at all.
If you are looking for something specific — a matched pair, a particular colour, a calibrated size for a setting you already own — write to us. Most of our best stones are found for a customer rather than found by one.