Granite
Plutonic felsic igneous rock
igneous
Category
Mineral (Synthetic)
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
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Diamond (in a metal ring setting)
Diamond (Pure Carbon, C)
mineral
Quartzite pebble
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Basalt with Amygdaloidal Infilling
Porphyritic or Amygdaloidal Basalt
igneous
Kyawthuite
Kyawthuite (Bi3+Sb5+O4)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)
igneous
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Banded Agate (Lake Superior Agate style)
Silicon Dioxide (SiO2)
mineral
Rainbow Moonstone
White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8
gemstone
Amethyst Cluster
Silicon Dioxide (SiO2) with iron impurities
mineral
Rainbow Moonstone (White Labradorite)
White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Amethyst Geode
Amethyst (Silicon Dioxide, SiO2)
mineral
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
sedimentary
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Mineral
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Amethyst (Ametrine or Bicolor Quartz variant)
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Citrine Quartz Crystal Cluster
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst in Matrix
Silicon Dioxide with Iron Impurities (SiO2)
mineral
Hypersthene
Hypersthene ((Mg,Fe)SiO3)
mineral
Epidosite (Unakite-related)
Epidosite (composed primarily of Epidote and Quartz)
metamorphic
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide (SiO2) with inclusions
mineral
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Copper-bearing Quartz (with Malachite and Iron Oxides)
Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)
Mineral Specimen
Amethyst and Peridot
Amethyst (SiO2 with iron impurities) and Peridot ((Mg, Fe)2SiO4)
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silicified Riebeckite Asbestos (SiO2 with inclusions)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide)
metamorphic
Moqui Marble (Ironstone Concretion)
Iron Oxide Concretion (Fe2O3)
sedimentary
Amethyst (Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2)
mineral
Opal
Hydrated silica (SiO2 "NH2O)
mineraloid
Biotite on Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral