Mineral Precipitate (Anthropogenic Context)

Prehnite

Prehnite, Ca2Al(AlSi3O10)(OH)2

Green Fluorite

Calcium Fluoride (CaF2)

Sunstone

Oligoclase or Andesine (Feldspar Group), (Ca,Na)((Al,Si)4O8)

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Granite Pegmatite

Phaneritic Plutonic Igneous Rock

Selenite / Gypsum

Gypsum (CaSO4·2H2O)

Mica Schist

Mica Schist

Sandstone

Sandstone (clastic sedimentary rock)

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Turquoise (possible Dyed Howlite or Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Turquoise)

Ferruginous Quartz (Iron-Stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Sandstone (Iron-Rich)

Arenite (Fe2O3)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Azurite with Malachite and Limonite

Azurite Cu3(CO3)2(OH)2 / Malachite Cu2CO3(OH)2

Red Sandstone

Arenite (Ferruginous Sandstone)

Red Sandstone (with possible iron oxide staining)

Sandstone (primarily Quartz with Hematite/Goethite cement)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Limonite

Limonite (Hydrous iron oxides, FeO(OH)·nH2O)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)

Turquoise

Hydrate phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Moonstone

Orthoclase (Potassium Feldspar) - (K,Na)AlSi3O8

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss (specifically Pink Gneiss)

Gneiss (high-grade regional metamorphic rock)

Tiger's Eye (Mineral Collection)

Tiger's Eye (SiO2 with crocidolite inclusions)

Green Calcite

Calcite (CaCO3)

Gneiss (Metamorphic Rock)

Gneiss

Purple Lepidolite with Quartz

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Sandstone (with minor quartz and possible clay components)

Clastic Sedimentary Rock (SiO2 dominated)

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Sandstone Cobble

Arenite (Sandstone)

Sandstone (likely Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O) coatings

Sandstone (Arkose)

Arkose Sandstone (SiO2 with KAlSi3O8)

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Fluorite

Fluorite (CaF₂)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment