mineraloid
Pink Opal
Hydrated amorphous silica (SiO2·nH2O)
AI-generated identification · may be incorrectHardness of 5.5 to 6.5 on the Mohs scale, pale pink to rose color, waxy to vitreous luster, and an amorphous crystal structure.
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Physical properties
Hardness of 5.5 to 6.5 on the Mohs scale, pale pink to rose color, waxy to vitreous luster, and an amorphous crystal structure.
Formation & geological history
Forms at low temperatures from silica-rich water solutions deposited in cavities of volcanic and sedimentary rocks.
Uses & applications
Widely used in ornamental carvings, polished crystal points, and jewelry making.
Geological facts
Unlike precious opal, pink opal typically lacks play-of-color and gets its pastel hue from microscopic inclusions of minor minerals or organic compounds.
Field identification & locations
Identified by its distinctive opaque pink coloration and lack of cleavage; commonly sourced from Peru, Australia, and the western United States.
