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

Oval Buff Top Single Bevel Genuine Black Onyx

Part # 947-811 Only 2 left Weight <0.1 lb / <5 g
$2.25
Select Size: 9x7mm
Volume pricing
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Availability Sold out

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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, uniform black color. Black Onyx is the top-selling chalcedony in the jewelry market and has a rich history of use in Art Deco jewelry design.

These oval buff top cabochons feature a single bevel cut and uniformly opaque black appearance, making them well suited for rings, pendants, brooches, and other classic settings. To clean, use warm soapy water. Ultrasonic and steam cleaning is generally considered safe for these stones.

Features

  • Genuine black onyx cabochons — dyed black chalcedony
  • Oval buff top, single bevel cut
  • Uniform opaque black color throughout
  • Chemically treated to achieve consistent deep black color
  • Well suited for Art Deco-inspired and classic jewelry settings
  • Safe to clean with warm soapy water; ultrasonic and steam cleaning generally safe

Specifications

Stone Type Black Onyx (dyed black chalcedony)
Cut Oval buff top, single bevel
Color Uniform opaque black
Treatment Dyed
Transparency Opaque
Sold As Individual stone

Available Options

Part # Size
947-811 9x7mm
947-812 12x10mm
947-813 14x12mm
947-814 16x12mm

Specifications

Brand
Otto Frei
Part #
947-811
Type
Cabochon
Dimensions
0.1 in x 0.1 in x 0.1 in
Stone Type
Black Onyx (dyed black chalcedony)
Cut
Oval buff top, single bevel
Color
Uniform opaque black
Treatment
Dyed
Transparency
Opaque
Sold As
Individual stone
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.

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