mineral

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Hardness: 6-7 (quartz-based) to 6-6.5 (pyrite); Colors: orange, green, grey, and metallic gold; Luster: Vitreous (polished) to Metallic (pyrite); Structure: Trigonal/Cubic.

Hardness: 6-7 (quartz-based) to 6-6
Luster: Vitreous (polished) to Metallic (pyrite)

Identified April 18, 2026More mineral →

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Physical properties

Hardness: 6-7 (quartz-based) to 6-6.5 (pyrite); Colors: orange, green, grey, and metallic gold; Luster: Vitreous (polished) to Metallic (pyrite); Structure: Trigonal/Cubic.

Formation & geological history

Most are chalcedony varieties formed in volcanic cavities or sedimentary environments; Pyrite forms in hydrothermal veins or sedimentary deposits. These are processed through mechanical tumbling.

Uses & applications

Jewelry, pocket stones, decorative accents, metaphysical collections, and educational kits.

Geological facts

This collection includes 'Fool's Gold' (Pyrite) which was often mistaken for real gold due to its metallic luster and yellow hue. The banded orange stone is an Agate, which has been used for talismans for over 3,000 years.

Field identification & locations

Identify Agate by its characteristic banding; Pyrite by its metallic sheen and heavy weight; Aventurine by its shimmering 'aventurescence'. Commonly found in gift shops and rockhound starter kits.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

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

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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

Metamorphic Rock

Green Apatite on Albite

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

mineral