Yellow Aventurine
Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)
mineral
Category
Mineral (Refined Metal)
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
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Limonite-pseudomorph after Pyrite (Prophecy Stone)
Goethite and Limonite secondary minerals (FeO(OH)·nH2O) replacing Pyrite (FeS2)
mineral
Sunstone
Oligoclase (Feldspar variety), (Na,Ca)(Si,Al)4O8
mineral
Limonite Pseudomorph after Pyrite
Limonite (Hydrous iron oxides, FeO(OH)·nH2O) replacing Pyrite (FeS2)
mineral
Sunstone
Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions
mineral
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Sunstone
Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8
mineral
Green Aventurine
Quartz (with Fuchsite inclusions) - SiO2
mineral
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
mineral
Mica Schist
Mica Schist (primarily composed of Muscovite/Biotite)
metamorphic
Basalt
Basalt
igneous
Vesicular Basalt (or Scoria)
Vesicular Basalt (Aphanitic-vesicular volcanic rock)
igneous
Calcite
Calcite (calcium carbonate, CaCO₃)
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
Mineral
Milky Quartz (Common Quartz/Crystalline Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Red Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Celestine (or Celestite)
Celestine (Strontium Sulfate, SrSO4)
mineral
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Ironstone (with possible Hematite/Limonite coating)
Ironstone (Fe-rich sedimentary rock)
sedimentary
Native Copper in Basalt
Cuprum (with Host Basalt)
igneous
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Schist
Mica Schist (primarily Muscovite and Biotite)
metamorphic
Jet
Lignite (Anthracite-grade compact coal)
sedimentary
Biotite Schist
Biotite Schist (predominantly K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Tiger Diamond / Hematite-infused Quartzite
Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)
metamorphic
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Tumbled hematite-rich jasper
Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite (Fe₂O₃)
mineral
Quartz vein rock with iron-stained matrix
Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica
mineral
Iron-rich slag or limonite-bearing rock
Hydrated iron oxides, chiefly limonite/goethite (FeO(OH)·nH₂O); possibly industrial iron slag
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Sodalite-bearing rock, likely sodalite-rich syenite or sodalite in feldspathic matrix
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, with probable feldspar and accessory minerals
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (variety of Quartz)
Small metallic meteorite-like specimen
Unclassified iron-rich meteorite candidate; possibly an ordinary chondrite or terrestrial slag
meteorite
Green Aventurine
Aventurine Quartz (SiO2 + Cr-bearing Mica inclusions)
metamorphic
Basalt with Weathered Crust
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Mica Schist
Mica Schist (contains muscovite/biotite, quartz, plagioclase)
metamorphic
Ironstone Concretion / Hematite Nodules
Ferruginous Sedimentary Rock (primarily Hematite Fe2O3 and Goethite FeO(OH))
sedimentary
Copper-bearing Mica Schist
Mica Schist with Native Copper inclusions
metamorphic