mineral
Pink Opal
Hydrated Silica (SiO2·nH2O)
AI-generated identification · may be incorrectHardness: 5.5-6.0 on Mohs scale; Color: Delicate pink to salmon; Luster: Vitreous to waxy; Crystal structure: Amorphous; Cleavage: None; Specific Gravity: 1.9-2.3
- Hardness
- 5
- Color
- Delicate pink to salmon
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 5.5-6.0 on Mohs scale; Color: Delicate pink to salmon; Luster: Vitreous to waxy; Crystal structure: Amorphous; Cleavage: None; Specific Gravity: 1.9-2.3
Formation & geological history
Formed from silica-rich groundwater filling cavities in volcanic rocks and sedimentary layers. This specific variety is largely associated with the Tertiary period in the Andes Mountains.
Uses & applications
Primarily used in jewelry for cabochons and beads, as a healing stone in metaphysical communities, and as a collector's specimen.
Geological facts
Unlike 'precious' opal, pink opal is a 'common' opal, meaning it lacks play-of-color. Its pink hue often comes from tiny inclusions of palygorskite (a clay mineral) or organic compounds.
Field identification & locations
Identify by its waxy luster, lack of fire/flash, and distinct opaque pink color. It is most famously found in the Andes Mountains of Peru.
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