mineral

Pink Opal

Hydrated Silica (SiO2·nH2O)

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

Hardness: 5
Color: Pink to peach with white or cream inclusions
Luster: Vitreous to waxy

Identified June 30, 2026More mineral →

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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.