gemstone

Almandine Garnet

Fe3Al2(SiO4)3

Hardness of 7.5 on the Mohs scale, deep red to brownish-red color, vitreous luster, isometric crystal system, and no cleavage.

Identified October 20, 2026More gemstone →

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Physical properties

Hardness of 7.5 on the Mohs scale, deep red to brownish-red color, vitreous luster, isometric crystal system, and no cleavage.

Forms in metamorphic rocks like schists and gneisses via regional metamorphism, as well as in igneous pegmatites.

Widely used as a precious gemstone in jewelry and as an industrial abrasive in waterjet cutting.

Almandine is the most common and widely distributed member of the garnet group, often historically confused with rubies.

Identified by its distinct deep red color, high hardness, and lack of cleavage; commonly found worldwide in metamorphic terrains.

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