Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)
Chrysocolla in Cuprite / Mixed Copper Ore
Hydrated copper silicate and copper(I) oxide, (Cu,Al)2H2Si2O5(OH)4·nH2O and Cu2O
Yellow Calcite
Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Graphite
Graphite (Carbon, C)
Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide impurities
Pyrite in Matrix
Iron Disulfide (FeS2)
Mixed Mineral and Rock Collection
Mixed geological specimens (Quartz, Amethyst, Rose Quartz, Jasper, Epidote, Chert)
Small white mineral fragment
Indeterminate; possibly quartz, calcite, or feldspar
Iceland Spar (Optical Calcite)
Calcite (CaCO3)
Citrine
Quartz (SiO2) - variety Citrine
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Bumblebee Jasper
Fibrous Calcite with Arsenic and Sulfur Inclusions
Quartz (Moss-covered)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Yellow Quartz
Silicon Dioxide (SiO2)
White Quartz
Silicon Dioxide (SiO2)
Yellow Jasper
Chalcedony (SiO2)
Green Chert
Microcrystalline Quartz (SiO2)
Yellow Jasper
Opaque Cryptocrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Red Jasper
Silicon Dioxide (SiO2)
Jasper
Silicon Dioxide (SiO2) with impurities
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert Breccia
Brecciated Microcrystalline Quartz (SiO2)
Diorite
Diorite (plagioclase, hornblende, pyroxene, biotite)
Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
Red Granite
Phaneritic Felsic Intrusive Igneous Rock (primarily K-feldspar, Quartz, and Biotite)
Porphyry
Porphyritic Basalt/Andesite
Porphyritic Basalt
Porphyritic Basalt (containing Plagioclase phenocrysts)
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
Scoria (Lava Rock)
Vesicular Basalt / Scoria
Granite
Granite (Phaneritic intrusive igneous rock)
Scoria
Vesicular Basalt / Scoria (Mafic volcanic rock)
Porphyritic Basalt
Aphanitic-porphyritic mafic volcanic rock
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Cinnabar
Mercury(II) sulfide (HgS)
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
Tiny metallic mineral fragment, possibly native gold
Native gold (Au), unconfirmed; could also be pyrite or chalcopyrite