mineral
Quartz with impurities or Host Rock
SiO2 (Silicon Dioxide) with mixed silicates
AI-generated identification · may be incorrectHardness 7 (for quartz), white/translucent to grayish/greenish color, vitreous luster on fresh surfaces, massive crystal structure in this specimen, conchoidal fracture, specific gravity ~2.65
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Physical properties
Hardness 7 (for quartz), white/translucent to grayish/greenish color, vitreous luster on fresh surfaces, massive crystal structure in this specimen, conchoidal fracture, specific gravity ~2.65
Formation & geological history
Formed from hydrothermal veins or late-stage igneous crystallization; can occur in metamorphic environments. The green/darker material is likely a host rock or alteration mineral like chlorite.
Uses & applications
Used in glassmaking, electronics (if pure enough), construction aggregates, or as decorative yard stones.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Massive quartz pieces like this are often referred to as 'bull quartz'.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found universally in many geological environments.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous