Diamond Online
Zurich
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Diamond Online works from Kuttelgasse 4 in central Zurich and sells loose diamonds at bourse prices, with GIA certification on its stones. You can also customise an engagement ring or other jewellery around a chosen stone, and the firm offers appraisals, buys diamonds from customers and runs a B2B wholesale arm. References on the site cover GIA and HRD certification standards.
Its Diamond Knowledge pages explain how stones are valued and certified, and a price request tool and appointment booking are available for a personal consultation. The site is published in German, English and French, which fits a Zurich buyer who wants to choose a loose diamond first and decide on the setting afterwards.