Polished red banded stone, likely rhodonite
Rhodonite — manganese inosilicate, MnSiO₃; possibly rhodochrosite or dyed quartz
mineral
Category
Man Made Material (Simulated Mineral)
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Quartz with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Peridot (Olivine)
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Turquoise (Blue Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate
Agate (Cryptocrystalline variety of Silica, SiO2)
mineral
Milky Quartz with Hematite Staining
Silicon Dioxide (SiO2)
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Chert (Flint) with Glauconite
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Quartz Pebble with Chlorite or Epidote Inclusions
Silicon Dioxide (SiO2) with inclusions
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Gypsum Wallboard (Drywall)
Hydrous calcium sulfate (CaSO4·2H2O)
sedimentary (processed mineral product)
Sandstone
Arenite
sedimentary
Sandstone (likely Arkosic or Ferruginous)
Arenite (SiO2 with iron oxides or feldspar)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Fossil shell fragment, likely brachiopod or bivalve
Indeterminate fossilized carbonate shell; possibly Spiriferida (brachiopod)
fossil
Green Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary