mineral

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

Hardness: 7 (Quartz items), 6.5-7 (Agates). Colors: Purple (Amethyst), Pink (Rose Quartz), Green/Blue (Aventurine or Amazonite), Multi-colored (Agate). Luster: Vitreous to waxy. Structure: Hexagonal/Trigonal or Cryptocrystalline.

Hardness: 7 (Quartz items), 6
Luster: Vitreous to waxy

Identified April 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed through various geological processes: Amethyst and Rose Quartz typically form in pegmatites or hydrothermal veins; Agates and Chalcedony form in volcanic rock cavities or sedimentary deposits.

Uses & applications

Commonly used for lapidary work, jewelry making, decorative home decor, metaphysical collecting, and as educational sets for beginning enthusiasts.

Geological facts

This set contains two distinct forms of quartz: Macrocrystalline (visible crystals like the Amethyst) and Cryptocrystalline (microscopic crystals like the smooth Agates and Jaspers).

Field identification & locations

Identify by hardness (should scratch glass) and conchoidal fracture. Often found in riverbeds or near ancient volcanic activity. These specific tumbled stones are common commercial 'rock shop' specimens.

Other mineral specimens

See all

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