mineral

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

AI-generated identification · may be incorrect

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 →

Explore Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles in the encyclopedia →

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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.