fossil
Olive Sea Shell Fossil
Oliva sp. (Calcium Carbonate, CaCO3)
Hardness: 3-3.5 (Calcite); Color: Cream, tan, with brown zig-zag or tent patterns; Luster: Porcelain-like or vitreous; Shape: Cylindrical with a short spire and a long aperture.
- Hardness
- 3-3
- Color
- Cream, tan, with brown zig-zag or tent patterns
- Luster
- Porcelain-like or vitreous
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Physical properties
Hardness: 3-3.5 (Calcite); Color: Cream, tan, with brown zig-zag or tent patterns; Luster: Porcelain-like or vitreous; Shape: Cylindrical with a short spire and a long aperture.
Formation & geological history
Formed through the organic secretion of calcium carbonate by marine gastropods. These shells can range from recent beach specimens to fossils millions of years old found in sedimentary coastal deposits.
Uses & applications
Commonly used for sea shell collecting, jewelry (beads, pendants), and craft work. Fossilized versions are used for geological study and education.
Geological facts
The Olive snail is a carnivore that lives in sandy subtropical and tropical waters. The patterns on their shells are often used as a classic example of biological 'cellular automata' patterns in nature.
Field identification & locations
Identified by its smooth, cylindrical shape and shiny surface when fresh. Look for them in sandy tropical beaches or in Pliocene/Pleistocene limestone beds. Collectors look for undamaged spires and intact pigmentation.
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