Mineral
Dyed Agate
SiO2
Hardness: 6.5-7 (Mohs scale), Color: Black and dyed blue, Luster: Vitreous, Crystal structure: Cryptocrystalline, Cleavage: None, Specific gravity: 2.58-2.64
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Black and dyed blue, Luster: Vitreous, Crystal structure: Cryptocrystalline, Cleavage: None, Specific gravity: 2.58-2.64
Formation & geological history
Formed from silica-rich fluids filling cavities in volcanic rocks, later artificially dyed to enhance color.
Uses & applications
Used primarily in jewelry, ornamental objects, and as a collector's item.
Geological facts
Agate is a variety of chalcedony. This particular piece has been carved into a heart shape and artificially dyed blue to enhance its visual appeal.
Field identification & locations
Identify by its hardness (scratches glass), waxy luster, and banding (though altered by dye here). Common in rock shops.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral