gemstone

Blue Obsidian

Volcanic Glass (Amorphous)

Mohs hardness 5-5.5, vibrant blue color, vitreous luster, amorphous crystal structure, conchoidal fracture, specific gravity 2.35-2.45.

Identified October 20, 2026More gemstone →

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Physical properties

Mohs hardness 5-5.5, vibrant blue color, vitreous luster, amorphous crystal structure, conchoidal fracture, specific gravity 2.35-2.45.

Formed from rapidly cooling felsic lava where chemical impurities or artificial treatments create the blue coloration.

Used primarily in lapidary arts, jewelry making, and metaphysical crystal healing practices.

Natural blue obsidian is extremely rare; most vibrant blue specimens on the market are man-made glass.

Identify by its glassy luster and conchoidal fracture, though intense blue color often indicates synthetic origin.

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