gemstone
Bojonegoro Green Agate
SiO2 (Chalcedony variety)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, deep green to dark banded coloration, waxy to vitreous luster, and microcrystalline crystal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, deep green to dark banded coloration, waxy to vitreous luster, and microcrystalline crystal structure.
Formation & geological history
Forms in the cavities of volcanic rocks through the deposition of silica-rich groundwater over millions of years.
Uses & applications
Primarily cut and polished into cabochons for rings, pendants, and other jewelry items.
Geological facts
Widely treasured in Indonesian gemstone culture, particularly for its distinctive deep green hues originating from East Java.
Field identification & locations
Identified by its microcrystalline structure, conchoidal fracture, and green coloration; commonly sourced from riverbeds and mines in Indonesia.
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