mineral

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Varying colors (purple, pink, blue, yellow, brown); Hardness: 5-7 on Mohs scale; Luster: Vitreous to waxy; Structure: Mixed (Trigonal, Hexagonal, Cubic); Cleavage: Uneven to conchoidal.

Hardness: 5-7 on Mohs scale
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

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Physical properties

Varying colors (purple, pink, blue, yellow, brown); Hardness: 5-7 on Mohs scale; Luster: Vitreous to waxy; Structure: Mixed (Trigonal, Hexagonal, Cubic); Cleavage: Uneven to conchoidal.

Formation & geological history

Formed through various geological processes including igneous crystallization, hydrothermal deposition, and metamorphic alteration. Most specimens originate from pegmatite veins or volcanic cavities.

Uses & applications

Used primarily for lapidary work (tumbling/polishing), metaphysical purposes (healing crystals), decorative home accents, and educational geological identification.

Geological facts

This collection includes Amethyst (purple), Rose Quartz (pink), Sodalite (mottled blue), Apatite (teal green), and Tiger's Eye (banded brown). Many of these minerals have been used as gemstones since ancient Egyptian times.

Field identification & locations

Identification includes checking for color saturation and fracture patterns. These are commonly found in Brazil, Madagascar, and South Africa. For field ID, check harness against glass and observe light transparency.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

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

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral