gemstone

Operculum (Shiva's Eye / Cat's Eye Shell)

Biogenic Aragonite / Calcite (CaCO3)

Hardness of 3–3.5 Mohs, porcelain-like vitreous luster, white to cream color, showing a spiral or smooth dome structure.

Identified October 17, 2026More gemstone →

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Physical properties

Hardness of 3–3.5 Mohs, porcelain-like vitreous luster, white to cream color, showing a spiral or smooth dome structure.

Formed as the protective calcium carbonate trapdoor secreted by marine gastropods (sea snails) in coastal shallow-water environments.

Commonly used in organic jewelry, wire wrapping, amulets, and collected as natural curiosities.

Also known as the 'Pacific Cat's Eye,' it has been used worldwide as a protective talisman against the evil eye.

Identified by its distinctive spiral aperture, dense calcareous feel, and effervescence in dilute acid; found washed up on tropical beaches.

Ammolite

Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)

Gemstone Ring

N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ

Amber

Succinite (Organic Gemstone)

Diamond and Gold Jewelry

Carbon (Diamond) / Au (Gold)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Pearl necklace

Pearl, primarily aragonite (CaCO₃) and conchiolin