Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
sedimentary
Category
Mineral (Pseudomorph)
Browse mineral (pseudomorph) specimens identified by the Rock Identifier community.
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Scoria with Calcite Infills
Vesicular Basalt with secondary Calcification (CaCO3)
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone with Iron Oxide Staining
Arenite with Limonite/Hematite alteration
sedimentary
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Ironstone Concretion
Siderite or Hematite Concretion
sedimentary
Red Sandstone
Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Fossilized Bone Fragment
Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)
sedimentary
Ironstone (with Limonite/Goethite)
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)
sedimentary
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Desert Rose (Sand Barite/Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrated Calcium Sulfate (CaSO4·2H2O)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Brown Sandstone
Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)
sedimentary
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Amygdaloidal Basalt
Vesicular-Amygdaloidal Basalt (Mafic Extrusive)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Gold in Matrix
Native Gold (Au)
mineral
Amygdaloidal Basalt
Vesicular Basalt with Amygdules
igneous
Raw quartz (likely milky/smoky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Greenstone
Metabasalt / Chlorite-actinolite-epidote schist
metamorphic
Quartz (Iron-Stained / Yellow Quartz)
Silicon Dioxide (SiO2)
mineral
Raw Sapphire (Corundum)
Aluminum oxide (Al2O3)
gemstone
Quartz with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
igneous
Quartz Mix and Feldspar Group
Silicon Dioxide (SiO2) and Potassium Alumino-silicates (KAlSi3O8)
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
sedimentary
Lapis Lazuli (polished cabochon)
Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)
metamorphic
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral