Quartz

IMA-Approved Mineral Species


Properties and Data
Physical Properties
Composition
SiO2
Chemical Name
Silicon Oxide
Molecular Weight
60.083 g/mol
Density
2.65 - 2.66 g/cm3
Mohs Hardness
7
Melting Point
1700 °C (3092 °F)
Crystal System
Trigonal
Optical Properties
Type
Uniaxial (+)
Refractive Index
nω = 1.544
nε = 1.553
Dispersion Factor
0.013
Birefringence
δ = 0.009

Additional Properties
Inherent
Piezoelectric
Thermoluminescent
Additional Information
Otherwise known by Rock Crystal, Agate, Chalcedony, Smokey Quartz, Amethyst, Citrine, Rose Quartz, Prasiolite, Prase, Morion, Qwindel, Quartzine, Aventurine, Ametrine, Jasper, Carnelian, Herkimer Diamond, Onyx, or Sardonyx

Material articles have temporarily been disabled for renewal and polishing.
Variants and Types
Intrinsic
Intrinsic
Color: Colorless
Amethyst
Amethyst
Color: Pale Pink, Purple, Violet
Cause: Iron Ions
Smoky Quartz
Smoky Quartz
Color: Gray, Brown
Cause: Iraddiation with Aluminium Ions
Citrine
Citrine
Color: Yellow, Orange, Brown
Cause: Iron Oxide Suspension
Pink Quartz
Pink Quartz
Color: Pink
Cause: Iraddiation with Aluminium and Phosphorous Ions
Cobalt Quartz
Cobalt Quartz
Color: Blue
Cause: Cobalt Ions
Used for Specialty Optics
Production and Synthesis
References
REFERENCES





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