Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Category
Igneous
Browse igneous specimens identified by the Rock Identifier community.
Fluorite
Calcium Fluoride (CaF2)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
metamorphic
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Citrine
Silicon Dioxide (SiO2) - Macrocrystalline Quartz variety
mineral
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Grey Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Citrine
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sapphire
Corundum (Al2O3)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian
SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony
mineral
Yellow Quartz (Citrine or Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Soapstone
Steatite (composed primarily of Talc, Mg3Si4O10(OH)2)
metamorphic
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Serpentine
Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Banded Agate (Chert/Chaldcedony)
Silicon Dioxide (SiO₂)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral