Mineral

Jasper or Agate pendant

Silicon dioxide (SiO2)

Hardness: 6.5-7, Color: Light grey/white with tan/brown markings, Luster: Vitreous to waxy, Crystal Structure: Cryptocrystalline

Identified June 19, 2026More mineral →

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Physical properties

Hardness: 6.5-7, Color: Light grey/white with tan/brown markings, Luster: Vitreous to waxy, Crystal Structure: Cryptocrystalline

Formed from silica-rich fluids in cavities or fractures in host rocks over millions of years

Commonly used in jewelry, lapidary arts, and as a decorative stone

Agate and Jasper are varieties of chalcedony. This particular piece has been cut and polished into a teardrop shape and drilled for use as a pendant.

Identify by its hardness (scratches glass), waxy luster, and lack of cleavage. Often found in volcanic rocks or as nodules in sedimentary rocks.

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Schist

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Nephrite Jade

Nephrite

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]