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Description
Blue onyx, also known as blue agate, is dyed chalcedony — a microcrystalline quartz whose fine crystal structure is invisible to the unaided eye. Prized for its uniform translucent blue color, this stone has been a staple of jewelry making for nearly 3,000 years, valued for its versatility in carving, engraving, cameos, and signet work. These round cabochons offer jewelers and metalsmiths a consistent, ready-to-set stone in a range of sizes suited for rings, pendants, earrings, and more.
Features
- Dyed blue chalcedony (blue onyx / blue agate)
- Uniform translucent blue coloration throughout
- Round cabochon cut for versatile setting applications
- Treatment: Dyed
- Available in eight sizes from 6 mm – 20 mm
- Clean with warm, soapy water; ultrasonic and steam cleaning are generally safe
Specifications
| Stone Type | Blue Onyx (Blue Agate / Dyed Chalcedony) |
|---|---|
| Cut | Round Cabochon |
| Treatment | Dyed |
| Transparency | Translucent |
| Cleaning | Warm soapy water; ultrasonic and steam are generally safe |
Available Options
| Part # | Size |
|---|---|
| 947-B06 | 6 mm |
| 947-B08 | 8 mm |
| 947-B10 | 10 mm |
| 947-B12 | 12 mm |
| 947-B14 | 14 mm |
| 947-B16 | 16 mm |
| 947-B18 | 18 mm |
| 947-B20 | 20 mm |
Specifications
- Brand
- Otto Frei
- Part #
- Varies by size
- Type
- Cabochon
- Dimensions
- 0.1 in x 0.1 in x 0.1 in
- Stone Type
- Blue Onyx (Blue Agate / Dyed Chalcedony)
- Cut
- Round Cabochon
- Treatment
- Dyed
- Transparency
- Translucent
- Cleaning
- Warm soapy water; ultrasonic and steam are generally safe
California Prop 65 Warning:Cancer and Reproductive Harm. www.P65warnings.ca.gov.
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