mineral
Pink Opal
Hydrated Silica (SiO2·nH2O)
AI-generated identification · may be incorrectHardness: 5.5-6 (Mohs); Color: Pink to peach with white or cream inclusions; Luster: Vitreous to waxy; Crystal structure: Amorphous; Cleavage: None; Specific gravity: 1.9-2.3
- Hardness
- 5
- Color
- Pink to peach with white or cream inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 5.5-6 (Mohs); Color: Pink to peach with white or cream inclusions; Luster: Vitreous to waxy; Crystal structure: Amorphous; Cleavage: None; Specific gravity: 1.9-2.3
Formation & geological history
Formed from silica-rich waters at low temperatures, typically in volcanic ash layers or sedimentary environments during the Tertiary period. It occurs when silica settles in cavities or fissures.
Uses & applications
Commonly used in jewelry as cabochons, beads, and carvings. Also highly valued for metaphysical collections and ornamental decorative items.
Geological facts
Unlike precious opal, pink opal is a 'common opal' because it lacks the play-of-color (opalescence). Most high-quality pink opal is sourced from the Andes Mountains in Peru.
Field identification & locations
Identify by its characteristic pastel pink color, lightweight feel (low specific gravity), and lack of play-of-color. Found primarily in Peru, Australia, and parts of the United States.
