mineral
Green Turban Shell (Polished)
Turbo marmoratus (Aragonite/Calcite)
Hardness: 3.5-4 (Mohs scale), Color: Green and white patterned, Luster: Pearly or mother-of-pearl (nacreous) when polished, Material: Calcium Carbonate (CaCO3)
- Hardness
- 3
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Physical properties
Hardness: 3.5-4 (Mohs scale), Color: Green and white patterned, Luster: Pearly or mother-of-pearl (nacreous) when polished, Material: Calcium Carbonate (CaCO3)
Formation & geological history
Biological origin; formed by marine gastropods in coral reef environments. The shell is constructed by the mollusk over its lifetime through the precipitation of calcium carbonate from seawater.
Uses & applications
Decorative collecting, jewelry making (nacre/mother-of-pearl ornaments), aquarium decor, and traditional crafts.
Geological facts
The Green Turban is one of the largest species in its family. These shells have been used for centuries to carve into 'mother of pearl' buttons and decorative inlay work.
Field identification & locations
Identified by its heavy, thick-walled spiral shape and distinct green-marbled exterior. In the field, it is found in tropical Indo-Pacific coral reefs. Collectors look for the pearly sheen under the outer layer.
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