Diamond specialists
Dealers and houses that focus on loose diamonds and certification, useful if you want to choose the stone first and the setting second.
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Zurich
A Zurich diamond specialist selling GIA-certified stones at bourse (exchange) prices, aimed at buyers who want to choose a loose diamond first and decide on the setting afterwards.
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Zurich
Celinni's Zurich showroom on Dufourstrasse backs onto an online inventory of more than 100,000 certified diamonds (GIA, IGI, HRD), so you can compare stones widely before you commit to one.
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Online · dal 2000
Whiteflash is an online loose-diamond seller running since 2000, specialising in GIA-certified stones that also carry AGS ideal cut reports. Its A CUT ABOVE line is a super-ideal round cut with hearts-and-arrows precision, and every stone comes with HD video so you can judge it before buying. Free worldwide shipping means a Zurich buyer can pick the diamond first and ship it in for setting.
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Zurich · dal 2008
BAUNAT runs a showroom at Talstrasse 20, a short walk from Paradeplatz, where advisors work through GIA-certified stones with you and let you try the design in zirconia before the real diamond is set. The brand started in Antwerp in 2008 and sells direct rather than through a chain of shops, so you can pick the stone first and the setting after. Weekdays it's walk-in friendly, weekends are by appointment.
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Online
Blue Nile carries a very large loose-diamond inventory, well over 200,000 stones, searchable by shape, carat, colour, clarity and price, with GIA-graded options throughout. You can start with a diamond and add a setting, or start with a setting, which makes the stone-first route straightforward. It's one of the older online diamond sellers and ships internationally.
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Zurich · dal 2013
DiamAlps is a Swiss diamond merchant (a brand of Yazam GmbH) that arranges in-person viewings in Zurich and trades stones certified by GIA or HRD. They run on appointments rather than a shopfront, with offices reaching from Geneva and Basel to Antwerp and Hong Kong. The focus is loose certified stones and investment-grade diamonds, so you choose the diamond before any setting.
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Switzerland
123GOLD runs a Swiss diamond exchange where you filter loose stones by carat, colour, clarity and cut, with stones from 0.3 ct graded by recognised labs like GIA or IGI and cut to triple Excellent. They pair this with a ring configurator and a sample-ring service so you can try the shape before committing. Consultation runs online, by phone or in their Swiss stores, and you start from the stone.
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Online
Adiamor lets you search more than 200,000 GIA-certified diamonds and buy them loose or mounted in a setting of your choice. The diamond search and build-your-own-ring tools are built around choosing the stone first, then deciding how it's set. As an online seller it suits a Zurich buyer comparing certified stones across a wide inventory.
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Online · dal 2005
Brilliant Earth sells certified loose diamonds you can filter by shape, cut, clarity, carat and origin, graded by GIA, IGI or GCAL. Its Beyond Conflict Free sourcing standard is the brand's main draw for buyers who care where the stone came from. Founded in 2005, it ships internationally and is built around picking the diamond first, then the setting.
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Zurich
Stellini works from a showroom at Zentralstrasse 119a in Zurich and offers GIA and IGI certified diamonds you can review by appointment or online. Rings are handmade in Switzerland and come with a lifetime guarantee plus 60 days of free resizing. They lean toward finished pieces, so it's a good fit if you want a certified stone chosen alongside a ring rather than purely loose.
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Zurich · dal 2020
Green World Diamonds opened in Zurich's Kreis 1 in 2020 as a lab-grown diamond specialist, with a showroom on Scheitergasse and stones certified by IGI, GIA and GCAL. You can buy a loose lab-grown diamond and have it set, or browse finished pieces online with worldwide shipping. Worth a look if you want certified lab-grown stones and would rather start from the diamond.
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Zurich
Do Diamond runs a diamond exchange with net (pre-VAT) pricing and offers stones certified by GIA, HRD and IGI. Their office sits in the Limmat Tower in Dietikon, just outside Zurich, where you can inspect diamonds in person before deciding. It's set up around picking a loose certified stone first, then sorting out the setting.