mineral
Quartz Crystal Point
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: Colorless to white, Luster: Vitreous (glassy), Crystal structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), SG: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Colorless to white, Luster: Vitreous (glassy), Crystal structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), SG: 2.65
Formation & geological history
Formed through the cooling of silica-rich magma or from hydrothermal solutions in veins. They are found in igneous, metamorphic, and sedimentary rocks across various geological ages.
Uses & applications
Used in electronics (oscillators), glass manufacturing, abrasives, jewelry (gemstones), and as decorative interior specimens or for metaphysical collecting.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is traditionally called rock crystal or clear quartz.
Field identification & locations
Identify in the field by its hexagonal crystal habit with horizontal striations on the faces and its ability to scratch glass. Commonly found in pegmatites and mountain ranges worldwide.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock