Yellow Aventurine (Yellow Quartz)
Silicon Dioxide (SiO2) with inclusions of Muscovite or Mica
Mineral (variant of Quartz)
Category
Igneous, Sedimentary, Metamorphic, And Mineral
Browse igneous, sedimentary, metamorphic, and mineral specimens identified by the Rock Identifier community.
Quartzite (Meta-sedimentary)
Quartzite (SiO2)
metamorphic
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Aventurine (Green Aventurine)
Quartz with Fuchsite Inclusions (SiO2)
Mineral
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2) with various iron-oxide inclusions
mineral
Dalmatian Stone (Dalmatian Jasper)
Dalmatian Stone (A variety of Perthite / Aplite)
Igneous
Lapis Lazuli
Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Lapis Lazuli
Lapis Lazuli (Aggregate of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)
metamorphic
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Epidote in Matrix (likely Amphibolite or Gneiss)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix
metamorphic
Marble
Recrystallized Limestone (CaCO3)
metamorphic
Baroque Pearl (and potentially a small Sapphire/Blue Topaz)
Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.
Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Dalmatian Stone (often called Dalmatian Jasper)
Peralkaline Feldsphathic Igneous Rock
igneous
Sunstone
Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8
Mineral
Chalcedony (Agate/Jasper mix in host rock)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon dioxide (SiO2) - variety of Chalcedony
mineral
Schist
Schist
Metamorphic
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Rose Quartz
Rose Quartz (SiO₂)
mineral
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Mineral
Muscovite Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2 with SiO2)
metamorphic
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)
metamorphic
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Agate
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Rhodonite
Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn
Mineral
Vesuvianite (Idocrase)
Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10
mineral
Lapis Lazuli
Lapis Lazuli (Rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Anthracite Coal
Anthracite (Carbon-based sedimentary-metamorphic rock)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Dalmatian Stone
Dalmatian Jasper (actually a Peralkaline Igneous Rock)
igneous
Quartz with Mica/Chlorite inclusions
Silicon Dioxide (SiO2) with phyllosilicate inclusions
igneous/metamorphic mineral specimen
Marble (polished)
Recrystallized Calcite (CaCO3)
metamorphic
Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
mineral
Eclogite
Eclogite (Omphacite + Pyrope)
metamorphic
Schist
Mica Schist (Metamorphic Rock)
metamorphic