Mineral_rock

Red Sandstone (Iron-stained)

Clastic sedimentary rock (primarily Quartz with Iron Oxides)

Gneiss

Gneiss (Metamorphic Rock)

Banded metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss, possibly migmatitic

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Bauxite (Laterite)

Hydrated aluminum oxides (Al2O3·nH2O)

Weathered granitic rock fragment

Granitoid, likely granodiorite or granite

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

Bicolor Quartz Tumble

Silicon Dioxide (SiO2)

Fluorite (specifically Blue John or Banded Fluorite)

Calcium Fluoride (CaF2)

Chrysocolla with Malachite

Cu2-xAlx(H2-xSi2O5)(OH)4%CnH2O (Chrysocolla)

Quartz with Calcite

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Pyrite-bearing quartz vein rock

Pyrite (FeS₂) with quartz (SiO₂), likely in a schistose or altered host rock

Yellow Ochre / Limonite

Hydrated ferric oxide (FeO(OH)·nH2O)

Milky Quartz

Silicon Dioxide (SiO2)

Apatite

Fluorapatite (Ca5(PO4)3F)

Milky Quartz with Tourmaline and Iron Oxides

Silicon Dioxide (SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Likely garnet-bearing rock fragment

Garnet-bearing schist or gneiss; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃

Kidney Stone

Nephrolith (typically Calcium Oxalate - CaC2O4)

Pale green stone, possibly serpentine

Serpentinite (dominantly serpentine-group minerals; visual identification is uncertain)

Copper-bearing metamorphic rock, likely bornite- or chalcopyrite-rich schist

Quartz–mica schist with disseminated copper sulfides; possible bornite (Cu₅FeS₄) and chalcopyrite (CuFeS₂)

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Polished mixed rock, likely orbicular/epidote-bearing granite or basalt

Uncertain; probable quartz–feldspar–amphibole/epidote aggregate

Ruby (Raw Corundum)

Corundum (Al2O3) with Chromium traces

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Quartz pebble

Silicon dioxide (SiO2)

Kaolinite (China Clay)

Kaolinite (Al2Si2O5(OH)4)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Native Copper

Copper (Cu)

Quartz crystal cluster (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂), with possible iron-oxide inclusions

Banded quartz-rich rock (possibly pegmatite)

Likely quartz–feldspar pegmatite; identification is tentative from the photo

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

Quartz-bearing pegmatitic rock, likely granite/pegmatite

Feldspar–quartz pegmatite; chiefly K-feldspar, plagioclase, quartz, and possible mica

Malachite

Copper Carbonate Hydroxide, Cu2CO3(OH)2

Turquoise

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

Eudialyte

Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Turquoise

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

Weathered serpentinized ultramafic rock

Serpentinite; chiefly serpentine-group minerals, commonly with magnetite, brucite, talc, and relict olivine/pyroxene

Quartz-rich rock fragment, possibly milky quartz or quartzite

Quartz (SiO₂), likely with minor iron-oxide or feldspar staining