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Onyx Gemstone Jewellery

Designed & handmade in our London workshop
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Onyx is a variety of the microcrystalline quartz, called chalcedony. It is a form of agate.The name “chalcedony” comes from Calcedon or Calchedon, an ancient port on the Sea of Marmara in Asia Minor. Onyx is the Greek word for “claw” or “fingernail” because the veins in the agate resemble the colors of a fingernail. Different varieties of onyx have different coloured parallel bands but it is the deep, opaque black, polished to a high shine by skillful hands, which is the most desired. Very popular in the 1970’s this beautiful classic stone is having a resurgence. We love its luxurious rich depth and use it in our fine jewellery collections.

You can buy Stephen Einhorn's Onyx jewellery collection online or you can visit us at our London Boutique at 210 Upper Street, Islington, N1 1RL. We'd love to see you... and don't forget we are one of the few British companies left who make everything on site. We can alter, we can revamp, we can service, and generally look after your Stephen Einhorn jewellery. We pride ourselves on the highest levels of customer care and aftercare.

If you're shopping for Onyx jewellery gifts and require a little help with your search for the perfect piece, please don't hesitate to give us a call on +44 (0) 20 7359 4977 or email us at