mineral
Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
Hardness: 3.5 - 7 (depending on specific mineral veins), Color: Brownish-tan with minor green oxidation patches, Luster: Dull to earthy, Crystal Structure: Massive/amorphous matrix with minor crystalline inclusions, Specific Gravity: ~2.5 - 3.2
- Hardness
- 3
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Physical properties
Hardness: 3.5 - 7 (depending on specific mineral veins), Color: Brownish-tan with minor green oxidation patches, Luster: Dull to earthy, Crystal Structure: Massive/amorphous matrix with minor crystalline inclusions, Specific Gravity: ~2.5 - 3.2
Formation & geological history
Formed in hydrothermal alteration zones, typical of the rich porphyry copper deposits found along the Andean cordillera in central Chile.
Uses & applications
Source of copper extraction, geological study, mineral specimen collecting
Geological facts
The provided coordinates (33.2°S, 70.6°W) place this specimen in the central Andes near Santiago, Chile, one of the world's premier copper-producing metallogenic belts.
Field identification & locations
Look for secondary copper minerals (like malachite stains) alongside quartz and altered host rock. Common in mining waste rock and outcrops throughout central Chile.
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