sedimentary
Pink Tumbled Agate
Microcrystalline Quartz (SiO2)
Hardness: 6.5-7 Mohs; Color: Pale pink, white, and tan; Luster: Waxy to vitreous (when polished); Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture)
- Hardness
- 6
- Color
- Pale pink, white, and tan
- Luster
- Waxy to vitreous (when polished)
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Physical properties
Hardness: 6.5-7 Mohs; Color: Pale pink, white, and tan; Luster: Waxy to vitreous (when polished); Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture)
Formation & geological history
Formed in cavities of volcanic rocks or ancient sedimentary formations through the deposition of silica from groundwater over thousands of years. Usually found in geodes or as nodules.
Uses & applications
Commonly used in tumbled stone kits, jewelry cabochons, metaphysical practices, and as decorative gravel.
Geological facts
Agate is a variety of chalcedony characterized by its banding. The pink color is often due to iron oxide inclusions or may be enhanced through dyeing in commercial specimens.
Field identification & locations
Identify by its translucency and subtle banding patterns. Commonly found in Brazil, India, and the United States. It is a popular 'starter' stone for young collectors.
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