Quartz (Smoky/Milky variant)
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Variant Of Quartz)
Browse mineral (variant of quartz) specimens identified by the Rock Identifier community.
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Quartz (Milky/Common variant)
Silicon Dioxide (SiO2)
mineral
Granite (Micro-specimen)
Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
mineral
Amazonite
Microcline (KAlSi3O8 variant)
mineral
Amazonite
Microcline (KAlSi3O8 variant)
mineral
Quartz (Chert/Chalcedony variant)
Silicon dioxide (SiO2)
mineral
Red Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Chert (or possibly Flint)
Chert (variant: Flint)
Sedimentary
Granite
Granite (Felsic Plutonic Rock / SiO2 + Al2O3 + K2O + Na2O + CaO + FeO + MgO)
igneous
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
mineral
Granite or granitic gneiss
Coarse quartz–feldspar–mica rock; possible gneissic variant
igneous
Chalcedony (Common Opal variant or Quartz)
Silicon Dioxide (SiO2)
mineral
Weathered granite or granitic gneiss
Granite: quartz + feldspar + mica; possible gneissic variant
igneous
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Granite
Phaneritic Plutonic Igneous Rock (Granite)
igneous
Likely weathered granite or granitic gneiss
Granite: quartz + feldspar + mica; possible gneissic variant
igneous
Granite
Felsic intrusive igneous rock
igneous
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz (Smoky/Grey Quartz Variant)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pegmatite (White Granite variant)
Pegmatitic Granite (Quartz and Feldspar rich)
igneous
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
sedimentary
Granite
Course-grained intrusive igneous rock
igneous
Pink Quartz (Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
sedimentary
Chert (and Flint variant)
Chert (SiO2)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Red Granite
Phaneritic Felsic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Chert (Red Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Tiger's Eye (variations include Blue or Hawk's Eye)
Silicon Dioxide with Crocidolite inclusions (SiO2)
Metamorphic mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled tiger’s-eye
Tiger’s-eye quartz, fibrous chalcedony/quartz (SiO₂) with crocidolite pseudomorphs
mineral
Amethyst and Citrine (Quartz variants)
Silicon Dioxide (SiO2)
mineral
Chert (Common Opal/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Green and Black Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary