Amygdaloidal Basalt with Epidote/Chlorite
Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))
igneous
Category
Mineral Structure
Browse mineral structure specimens identified by the Rock Identifier community.
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Garden Quartz (Shaman Quartz)
Silicon Dioxide (SiO2) with various inclusions (Hematite, Chlorite, Feldspar)
mineral
Garden Quartz (Lodalite)
Silicon Dioxide with various mineral inclusions (SiO2)
mineral
Druzy Quartz (Botryoidal)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Druzy Quartz Geode (likely Smokey Quartz variety)
Silicon Dioxide (SiO2) - specifically a geode formation lined with druzy quartz crystals, with a likely brownish hue indicating smokey quartz.
Mineral structure/Rock
Nephrite Jade / Epidote Pebble
Ca2(Mg,Fe)5Si8O22(OH)2 / Ca2Al2Fe3+(SiO4)(Si2O7)O(OH)
metamorphic
Desert Rose
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with Sand inclusions
mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Amazonite
Microcline (KAlSi3O8) with Pb trace impurities
mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)
sedimentary
Chrysocolla-bearing copper ore
Chrysocolla (hydrated copper aluminum silicate), likely with malachite/azurite and copper sulfides
mineral
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Epidosite
Epidosite (Metasomatic calcium-aluminum silicate rock)
metamorphic
Snowflake Obsidian
Volcanic Glass (SiO2 with Cristobalite inclusions)
igneous
Pegmatite
Pegmatitic Granite
igneous
Tiger's Eye
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled orbicular granite
Granite, predominantly potassium feldspar, plagioclase, quartz, and biotite/hornblende
igneous
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Vesicular Basalt with Lichen
Vesicular Basalt
igneous
Labradorite
Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8)
mineral
Epidote in Basalt
Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)
igneous
Banded Gneiss
Gneiss (pronounced 'nice')
metamorphic
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Mineral
Pearl
Nacre (aragonite, CaCO₃, in a conchiolin matrix)
gemstone
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Granite River Pebbles
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Bronzite
MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)
Mineral
Basalt with Epidote (Greenstone)
Amygdaloidal Basalt (Ca2(Al, Fe)3(SiO4)3(OH) inclusions)
igneous
Greenschist (Chlorite Schist)
Greenschist (containing chlorite, actinolite, and epidote)
metamorphic
Granite River Pebble
Granite
igneous
Fossilized Stingray Mouth Plate
Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)
fossil
Fossiliferous Limestone / Petrifaction
Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)
fossil
Porphyritic Andesite
Andesite (with white Plagioclase phenocrysts)
igneous
Granite
Plutonic felsic igneous rock
igneous
Septarian Nodule
Septarian Concretion (CaCO3 with Calcite/Aragonite and Clay/Mudstone)
sedimentary
Gneiss with Quartz Vein
Metamorphic Gneiss
metamorphic
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic