Rutilated Quartz Bracelet
Quartz (Silicon Dioxide, SiO2) with inclusions of Rutile (Titanium Dioxide, TiO2)
gemstone
Category
Mineral With Artificial Coating
Browse mineral with artificial coating specimens identified by the Rock Identifier community.
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Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Snowflake Obsidian and Green Aventurine
Volcanic Glass (SiO2 with Cristobalite inclusions) and Quartz (SiO2 with Fuchsite)
igneous and metamorphic
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Erythrite
Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O
mineral
Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)
sedimentary
Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Chert nodules
Microcrystalline Quartz (SiO2)
sedimentary
Basalt with Quartz Veins
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Hematite
Iron Oxide (Fe2O3)
mineral
Sunstone
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Peridot
Olivine (Mg, Fe)2SiO4
mineral
Sandstone with Iron Staining
Arenite (SiO2 with Fe2O3)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Snowflake Obsidian
Volcanic Glass with Spherulite inclusions (mainly Cristobalite)
igneous
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Amazonite
Microcline (KAlSi3O8) with Pb impurities
mineral
Shattuckite (Blue Quartz/Jasper Matrix)
Shattuckite (Copper Silicate Hydroxide - Cu5(SiO3)4(OH)2)
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Moqui Marble (Ironstone Concretion)
Iron Oxide Concretion (Fe2O3)
sedimentary
Basalt with Phenocrysts
Porphyritic Basalt
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Schist
Chlorite/Mica Schist
metamorphic
Porphyritic Basalt
Basalt (with plagioclase or k-feldspar phenocrysts)
igneous
Granite
Granite
Igneous
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Granite
Intrusive igneous rock (Acidic)
igneous
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic glass (SiO2-rich)
igneous