mineral
Quartz (Milky or Yellow/Citrine Quartz)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, vitreous to greasy luster, translucent to opaque, conchoidal fracture with no true cleavage, hexagonal crystal system often appearing massive or tumbled in this form.
Identified More mineral →
Explore Quartz (Milky or Yellow/Citrine Quartz) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale, vitreous to greasy luster, translucent to opaque, conchoidal fracture with no true cleavage, hexagonal crystal system often appearing massive or tumbled in this form.
Formation & geological history
Formed in a wide variety of geological environments including igneous, metamorphic, and sedimentary rocks. Often crystallizes from silica-rich hydrothermal veins and pegmatites.
Uses & applications
Used in electronics, oscillators, glassmaking, abrasives, gemstone carving, and mineral specimen collecting.
Geological facts
Quartz is one of the most abundant and widely distributed minerals on Earth's continental crust. Given the regional prior near Karnataka/Andhra Pradesh in India, quartz and pegmatitic minerals are extremely common in the local Dharwar craton geology.
Field identification & locations
Easily identified by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Common in river gravels and weathered outcrops.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
mineral
Schist
Schist
Metamorphic
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral