Onyx noir véritable ovale, double biseau bombé, avec trou

Black Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye. Natural black chalcedony is exceptionally rare — virtually all black chalcedony available commercially is grey chalcedony that has been chemically treated to achieve its signature deep, opaque black color. Black Onyx is the top-selling chalcedony in the market and was a hallmark material in Art Deco jewelry design. These oval buff top double bevel cabochons feature a pre-drilled hole, making them ready for a variety of setting and stringing applications.

Features

• Genuine black onyx cabochons with uniform opaque black color
• Oval buff top with double bevel profile
• Pre-drilled hole for versatile use in jewelry applications
• Dyed black chalcedony — chemically treated for consistent, deep black appearance
• Clean with warm, soapy water; ultrasonic and steam cleaning are generally safe

Specifications

Available Options