gemstone
Yellow Agate
Silicon Dioxide (Chalcedony), SiO2
Hardness: 6.5-7 on the Mohs scale; Color: Yellow, amber, translucent; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None
- Hardness
- 6
- Color
- Yellow, amber, translucent
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 6.5-7 on the Mohs scale; Color: Yellow, amber, translucent; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None
Formation & geological history
Formed in the cavities of volcanic and metamorphic rocks through the deposition of silica-rich groundwater over millions of years.
Uses & applications
Used primarily in jewelry making, ornamental carvings, polished display specimens, and metaphysical practices.
Geological facts
Agate has been prized as an ornamental stone since ancient times, frequently used in ancient Babylonian and Egyptian seals and talismans.
Field identification & locations
Identified by its translucent to opaque waxy luster and distinct microcrystalline banding under backlighting. Found worldwide, with notable deposits in Brazil, India, Madagascar, and the USA.
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