mineral
Tumbled lavender quartz (likely lepidolite-bearing quartz or dyed quartz)
Quartz, SiO₂; possible lepidolite mica inclusions
AI-generated identification · may be incorrectPale purple, translucent-to-opaque, glassy/waxy luster, rounded tumbled form, no visible cleavage; quartz hardness Mohs 7 and specific gravity about 2.65. The uniform lavender color and smooth polish make dyeing or mica inclusions possible; image alone cannot confirm the identity.
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Physical properties
Pale purple, translucent-to-opaque, glassy/waxy luster, rounded tumbled form, no visible cleavage; quartz hardness Mohs 7 and specific gravity about 2.65. The uniform lavender color and smooth polish make dyeing or mica inclusions possible; image alone cannot confirm the identity.
Formation & geological history
Quartz forms in hydrothermal veins and cavities, commonly with lithium-bearing mica such as lepidolite; specimens may be Precambrian to recent. Tumbled pieces are human-processed geological material.
Uses & applications
Used as a lapidary stone, decorative object, cabochon, and inexpensive jewelry component; not generally valuable as gem material.
Geological facts
Purple quartz is commonly called amethyst when its color is natural and caused mainly by iron-related defects and irradiation. Lepidolite-bearing quartz may show glittery mica or uneven lavender zoning.
Field identification & locations
Check hardness with a scratch test against glass, inspect for mica sparkle, and use UV or dye checks cautiously; common sources include Brazil, Madagascar, and the United States. A small tumbled piece typically sells for $1-$10; unusual natural color or provenance may bring $10-$30.
