mineral
White quartz-rich stone, possibly milky quartz or quartzite
Quartz (SiO₂), possibly microcrystalline quartzite
AI-generated identification · may be incorrectWhite, opaque to slightly translucent, with a dull-to-waxy luster and irregular conchoidal-to-granular fracture; quartz hardness is Mohs 7, with no cleavage and specific gravity about 2.65. The rounded edges suggest natural abrasion or tumbling, while brown specks may be iron-oxide staining or inclusions.
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Physical properties
White, opaque to slightly translucent, with a dull-to-waxy luster and irregular conchoidal-to-granular fracture; quartz hardness is Mohs 7, with no cleavage and specific gravity about 2.65. The rounded edges suggest natural abrasion or tumbling, while brown specks may be iron-oxide staining or inclusions.
Formation & geological history
Likely formed as a quartz vein or quartz-rich metamorphic material; quartz crystallizes in diverse geological settings from silica-rich fluids and rocks, ranging from Precambrian to recent ages. The smooth shape may result from stream, beach, or human tumbling.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are used as inexpensive decorative or lapidary specimens.
Geological facts
Quartz is one of Earth’s most abundant minerals and is chemically resistant, allowing it to persist after surrounding rocks weather away.
Field identification & locations
Check for glass-scratching hardness, lack of cleavage, and a white streak; calcite would be softer and fizz in dilute acid. Common worldwide, especially in quartz veins and quartzite terrains.
