mineral

Milky Quartz Pebble with Inclusions

Quartz (SiO2) with chlorite or mica inclusions

Hardness: 7 on Mohs scale. Color: Off-white to milky white with greyish-green inclusions. Luster: Vitreous to dull/waxy when weathered. Crystal structure: Trigonal (microcrystalline/massive). Cleavage: None (conchoidal fracture).

Hardness: 7 on Mohs scale
Color: Off-white to milky white with greyish-green inclusions
Luster: Vitreous to dull/waxy when weathered

Identified July 26, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermally active veins or pegmatites where silica-rich fluids crystallized slowly underground, enclosing secondary minerals like chlorite or mica, before being eroded into a smooth river/beach pebble.

Uses & applications

Mainly collected as a beach pebble or decorative specimen. Pure quartz is used in glassmaking, electronics, and abrasives.

Geological facts

Milky quartz gets its cloudy appearance from microscopic liquid or gas inclusions trapped during crystal growth millions of years ago.

Field identification & locations

Can be identified in the field by its hardness (scratches glass readily and cannot be scratched by steel), smooth water-worn texture, and distinct whitish matrix contrast with dark mineral veins or inclusions.

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Gypsum (variety Selenite or Alabaster)

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Mineral