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Oval Flat Top Double Bevel Genuine Black Onyx - Otto Frei
Otto Frei

Oval Flat Top Double Bevel Genuine Black Onyx

Part # 947-841 Only 2 left Weight <0.1 lb / <5 g
$3.48
Select Size: 9x7mm
Volume pricing
Total qty Discount Per unit You save
1 – 2 – $3.48 –
3 – 4 5% off $3.31 $0.17
5 – 9 10% off $3.13 $0.35
10 + 12% off $3.06 $0.42
Add 2 more for 5% off, saves another $0.17 each.

Availability Sold out

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Description

Black Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals that are 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 shiny black color. Black Onyx is the top-selling chalcedony in the jewelry market and was a hallmark gemstone of Art Deco design. These oval flat top double bevel cabochons feature uniform opaque black color, making them an ideal choice for setting in rings, pendants, bracelets, and other fine jewelry applications.

Care is straightforward: clean with warm, soapy water. Use of an ultrasonic or steam cleaner is generally considered safe for these stones.

Features

  • Genuine black onyx cabochons — dyed black chalcedony
  • Oval flat top with double bevel profile
  • Uniform opaque black color throughout
  • Chemically dyed to achieve consistent shiny black appearance
  • Classic gemstone choice for Art Deco-inspired and contemporary jewelry designs
  • Safe for ultrasonic and steam cleaning

Specifications

Stone Type Black Onyx (Dyed Black Chalcedony)
Shape Oval Flat Top Double Bevel
Treatment Dyed
Color Uniform Opaque Black
Transparency Opaque
Care Warm soapy water; ultrasonic and steam cleaners generally safe

Available Options

Part # Size
947-841 9x7mm
947-842 12x10mm
947-843 14x12mm
947-844 16x12mm

Specifications

Brand
Otto Frei
Part #
947-841
Type
Cabochon
Dimensions
0.1 in x 0.1 in x 0.1 in
Stone Type
Black Onyx (Dyed Black Chalcedony)
Shape
Oval Flat Top Double Bevel
Treatment
Dyed
Color
Uniform Opaque Black
Transparency
Opaque
Care
Warm soapy water; ultrasonic and steam cleaners generally safe
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.

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