Rock Identifier
Purple Agate (Silicon dioxide (SiO2)) — gemstone
gemstone

Purple Agate

Silicon dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, vibrant purple color due to artificial dying, vitreous to waxy luster, and microcrystalline crystal structure with no cleavage.

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, vibrant purple color due to artificial dying, vitreous to waxy luster, and microcrystalline crystal structure with no cleavage.

Formation & geological history

Formed by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks over millions of years.

Uses & applications

Widely used in jewelry, ornamental carvings, polished display specimens, and metaphysical collections.

Geological facts

Natural purple agate is extremely rare, so most specimens on the market are artificially dyed chalcedony.

Field identification & locations

Identified by its microcrystalline texture and conchoidal fracture, commonly sourced from Brazil, India, and Madagascar.