|Black Onyx Gemstone Information
Information * Loose gemstones * Jewelry links
Onyx has been linked to lovers by causing discord and cooling the fires of passion. It was thought that onyx carved with Mars, the God of war, gave Roman soldiers courage. It was also once believed that dark onyx caused bad dreams and sad thoughts.
ENHANCEMENT CODE D
Click to view AGTA code.
Refractive Index 1.535-1.539
Hardness = 6.5-7 (Moh's Scale)
Specific Gravity =2.60
Species - Chalcedony
Optic Character - Aggregate.
WARNINGS FOR CARE
Heat: Fair; color change may occur with heat
Chemicals that harm: Hydrofluoric acid, nitric acid
Crystal system: Hexagonal fibrous aggregates, micro crystalline quartz
|November||Topaz or Citrine|
|December||Blue Topaz or Zircon|
|Common Cut Examples.|