Likely rough garnet-bearing rock
Possibly almandine garnet in a metamorphic host; exact identification is uncertain from this photograph
metamorphic
Category
Mineral (Evaporite)
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Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Desert Rose
Gypsum rosette (CaSO4·2H2O)
mineral
Talc
Mg3Si4O10(OH)2
mineral
Biotite
K(Mg,Fe)_3AlSi_3O_10(OH,F)_2
mineral
Limonite
FeO(OH)·nH2O
mineral
Granite
Granite
Igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Unidentified dark mineral/rock fragment
Indeterminate; appearance may fit a sulfide-bearing rock or iron-rich mineral
mineral
Carved serpentine pendant
Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄), possibly mixed with chlorite or other inclusions
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Iron-rich rock fragment (possibly ironstone or limonite/goethite)
Likely ironstone composed largely of goethite/limonite; image alone cannot confirm
sedimentary
Limonite
FeO(OH)·nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Likely weathered granite or granitic gneiss
Quartz–feldspar–mica rock; possibly gneissic granite
igneous
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Blue-green mineral specimen, possibly turquoise
Uncertain from the image; turquoise is hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Quartz–feldspar pegmatite mineral specimen
Quartz (SiO₂) with potassium feldspar, albite, mica, and likely garnet or tourmaline
igneous
Likely olivine (peridot)
Olivine-group silicate, approximately (Mg,Fe)₂SiO₄
mineral
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Desert Rose (Baryte/Gypsum)
Barium sulfate (BaSO4) or Hydrated calcium sulfate (CaSO4·2H2O)
mineral
Likely serpentine-rich rock (serpentinite)
Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile); exact identification is uncertain from the image alone
metamorphic
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Magnetite (Lodestone)
Iron(II,III) oxide (Fe3O4)
mineral
Biotite-rich gneiss with a dark mafic band
Banded gneiss, likely quartz–feldspar–biotite gneiss (exact minerals uncertain from the image)
metamorphic
Red granite boulder
Granite, a coarse-grained felsic intrusive igneous rock; commonly quartz + feldspar + mica
igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
igneous
Iron-oxide-stained rock with a pale mineral vein
Likely limonite/goethite-stained quartz-bearing rock; exact identification is uncertain from the image
sedimentary
Sandstone
SiO2 (predominantly quartz sand)
sedimentary
Sandstone with Quartz Vein
Quartz-veined Arenite (SiO2 in detrital quartz matrix)
sedimentary
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Desert Rose
Gypsum (variety Selenite) - CaSO4·2H2O
mineral
Pink Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Desert Rose
Gypsum rosette (CaSO4·2H2O) or Barite rosette (BaSO4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Likely garnet crystal (rough fragment)
Garnet group; possibly almandine, Fe₃Al₂(SiO₄)₃
mineral
Polished banded agate (likely laguna-style fortification agate)
Microcrystalline quartz, SiO₂; chalcedony with concentric bands
mineral