gemstone

Ethiopian Opal

Hydrated amorphous silica (SiO2·nH2O)

Mohs hardness 5.5-6.5, translucent white with vibrant play-of-color, subvitreous to greasy luster, amorphous crystal structure with no cleavage.

Identified October 23, 2026More gemstone →

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Physical properties

Mohs hardness 5.5-6.5, translucent white with vibrant play-of-color, subvitreous to greasy luster, amorphous crystal structure with no cleavage.

Formed from silica-rich groundwater percolating into volcanic ash layers millions of years ago, predominantly found in the Welo province of Ethiopia.

Cut and polished into cabochons for high-end jewelry and coveted by mineral collectors.

Ethiopian opals are hydrophane, meaning they can absorb water and temporarily change transparency and weight.

Identified by their characteristic play-of-color and sticky feel on the tongue; sourced primarily from recent African mining deposits.

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