Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
Category
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
Quartz (possibly Citrine or Smoky Quartz variety)
Silicon Dioxide (SiO2)
Labradorite (Gray Tumbled)
Labradorite (Ca,Na)(Al,Si)4O8
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Epidote in Quartz (Epidosite)
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (Microcline)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
Amethyst (Quartz)
Silicon Dioxide (SiO2) with iron impurities
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Amethyst
Crystalline Silicon Dioxide with Iron impurities (SiO2)
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Rose Quartz
Rose Quartz (SiO2)
Amazonite
K(AlSi3O8)
Garnet
Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3
Labradorite
(Ca, Na)(Al, Si)4O8
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
Labradorite
Feldspar (Plagioclase Series), (Ca,Na)(Al,Si)4O8
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Blue Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
Granite Cobble
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Bloodstone
Heliotrope (a variety of Cryptocrystalline Quartz / Jasper, SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) with high Iron Oxide impurities
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
Andesite River Stones
Andesite
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
Pegmatite (Granite Pegmatite)
Intrusive Igneous Rock (Granite Pegmatite)
Nuummite
Nuummite (intergrowth of orthoamphiboles Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
Quartz (Milky Quartz/Citrine Type)
Silicon Dioxide (SiO2)
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
Quartz
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Vesicular Basalt (Pumice-like)
Vesicular Basalt