Dolomite
Dolomite (CaMg(CO3)2)
Mineral
Category
Mineral (Evaporite)
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
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Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Sedimentary
Quartz geode
Microcrystalline quartz (chalcedony) lining a cavity with crystalline SiO₂ quartz
mineral
Stalagmite (Flowstone)
Speleothem (Calcium Carbonate, CaCO3)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Desert Rose
Gypsum or Baryte rosette (CaSO4·2H2O or BaSO4)
mineral
Desert Rose
Gypsum variety selenite (CaSO4 · 2H2O)
mineral
Epidote
Ca2(Al,Fe)3(SiO4)3(OH)
mineral
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
mineral
Satin Spar (Satin Spar Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Gypsum (Satin Spar/Desert Rose variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Desert Rose (Sand Barite/Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrated Calcium Sulfate (CaSO4·2H2O)
mineral
Desert Rose
Gypsum rosette (CaSO4·2H2O) or Barite rosette (BaSO4)
mineral
Pegmatite with Tourmaline
Pegmatite / Silicate
igneous
Limonite
FeO(OH)•nH2O
mineral
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
mineral
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Chert with Quartz Druzy
Microcrystalline Quartz (SiO2) with Drusy Quartz Coating
sedimentary
Desert Rose
Gypsum or Baryte rosette (CaSO4·2H2O or BaSO4)
mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Limonite
FeO(OH)•nH2O
mineral
Desert Rose (Barite Rose / Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrous Calcium Sulfate (CaSO4%22H2O)
mineral
Desert Rose
Gypsum rosette (CaSO4·2H2O) or Barite rosette (BaSO4)
mineral
Unidentified pink-and-gray mineral or rock specimen
Undetermined; the image is too blurry for reliable identification
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral