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Cushion Buff Top Single Bevel Genuine Black Onyx - Otto Frei
Otto Frei

Cushion Buff Top Single Bevel Genuine Black Onyx

3 of 5 options in stock
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Description

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 on the market is grey chalcedony that has been chemically treated to achieve its characteristic deep, lustrous black color. Black Onyx has long been one of the top-selling chalcedony stones in the jewelry market and was widely featured in Art Deco designs. These cushion buff top single bevel cabochons offer a uniform opaque black appearance, making them a versatile choice for rings, pendants, bracelets, and other fine jewelry settings.

To care for Black Onyx, clean with warm soapy water. Use of an ultrasonic or steam cleaner is generally considered safe for these stones.

Features

  • Genuine Black Onyx (dyed black chalcedony)
  • Cushion buff top with single bevel profile
  • Uniform opaque black color throughout
  • Chemically dyed for consistent, deep black appearance
  • Suitable for use in rings, pendants, earrings, and other jewelry settings
  • Safe for ultrasonic and steam cleaning

Specifications

Stone Type Black Onyx (Dyed Black Chalcedony)
Cut Style Cushion Buff Top, Single Bevel
Treatment Dyed
Opacity Opaque
Color Uniform Opaque Black
Care Warm soapy water; ultrasonic and steam cleaning generally safe
Tags Cabochons, Genuine Cabochons, Resale

Available Options

Part # Size
947-410 12x10mm
947-411 9x7mm
947-412 14x10mm
947-413 14x12mm
947-414 16x12mm

Specifications

Brand
Otto Frei
Part #
Varies by size
Type
Cabochon
Dimensions
0.1 in x 0.1 in x 0.1 in
Stone Type
Black Onyx (Dyed Black Chalcedony)
Cut Style
Cushion Buff Top, Single Bevel
Treatment
Dyed
Opacity
Opaque
Color
Uniform Opaque Black
Care
Warm soapy water; ultrasonic and steam cleaning generally safe
Tags
Cabochons, Genuine Cabochons, Resale
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.

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