gemstone
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite/Sepiolite inclusions
Hardness: 5.5-6.0; Color: Pale pink to salmon with white mottling; Luster: Waxy to vitreous; Crystal Structure: Amorphous; Specific Gravity: 1.9-2.3.
- Hardness
- 5
- Color
- Pale pink to salmon with white mottling
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 5.5-6.0; Color: Pale pink to salmon with white mottling; Luster: Waxy to vitreous; Crystal Structure: Amorphous; Specific Gravity: 1.9-2.3.
Formation & geological history
Formed at low temperatures from silica-rich groundwater circulating through volcanic ash or sedimentary rocks. Much of the world's supply originates from the Andes Mountains in Peru.
Uses & applications
Predominantly used as a gemstone for jewelry (cabochons, beads, and pendants) and as a healing stone in metaphysical practices.
Geological facts
Pink opal is unique because it lacks the 'play-of-color' seen in precious opals; its color is due to organic compounds or inclusions of minerals like palygorskite. It is often called the 'Stone of Spiritual Awakening' in folklore.
Field identification & locations
Identify by its waxy texture and absence of fire. It is softer than quartz and reacts to intense heat by losing water content. Key localities include Peru, Mexico, and Australia.
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