mineral
Milky Quartz Pebble with Iron Inclusions
Crystalline Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Milky white to translucent with dark reddish-brown inclusions; Luster: Vitreous to greasy; Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous to greasy
Identified More mineral →
Explore Milky Quartz Pebble with Iron Inclusions in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to translucent with dark reddish-brown inclusions; Luster: Vitreous to greasy; Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture.
Formation & geological history
Formed from hydrothermal veins or as a primary constituent in igneous rocks like granite. This specimen appears water-worn, smoothed by wave or river action most likely during the Quaternary period.
Uses & applications
Primarily used as a decorative collectible or abrasive. Pure quartz is used in glassmaking and electronics (piezoelectricity).
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The milky color is caused by tiny fluid inclusions of gas and/or liquid trapped during crystal growth.
Field identification & locations
Identifiable by its inability to be scratched by a steel knife and its lack of cleavage. Commonly found on beaches and in riverbeds globally due to its high resistance to chemical and physical weathering.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock