Mineralological Specimen

Agate / Chalcedony Nodule

SiO2 - Silicon Dioxide

Druzy Quartz on Sandstone

Silicon Dioxide (SiO2) with Quartz Crystals on Clastic Sedimentary Rock

Milky Quartz with Chlorite/Moss Infusions

Silicon Dioxide (SiO2)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)

Iron-rich stone, likely limonite/goethite-bearing rock

Limonite (hydrated iron oxides; chiefly goethite, FeO(OH), with possible hematite)

Likely quartz-bearing rock fragment

Quartz (SiO₂), possibly with calcite or feldspar

Pink Granite

Phaneritic Felsic Igneous Rock

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz with Algae/Iron Staining

Silicon Dioxide (SiO2)

Quartz (Iron-stained or Rose variant)

Silicon Dioxide (SiO2)

Yellow Quartz (Polished)

Silicon Dioxide (SiO2) with iron inclusions

Likely halite (rock salt)

Halite, NaCl

Orange calcite

Calcite, CaCO₃

Iron-stained quartz-rich rock, possibly brecciated quartzite or rhyolite

Indeterminate quartz–feldspar rock with iron-oxide staining (SiO₂-rich; possible hematite/goethite)

Quartz-rich rock, likely milky quartz with iron staining

Mostly quartz (SiO₂); exact rock type cannot be confirmed from the image

Porous volcanic rock, likely scoria

Scoria, a vesicular basaltic to andesitic volcanic rock

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Diamond

Carbon (C)

Copper Ore / Altered Granodiorite

Cupriferous rock with silicate gangue

Dark coarse-grained rock, likely gabbro or amphibolite

Gabbro (plutonic mafic rock; mainly plagioclase and pyroxene), possibly amphibolite if metamorphosed

Gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and tests

Weathered gray metamorphic rock, likely phyllite or slate

Micaceous quartz–phyllosilicate rock; commonly quartz + muscovite/illite ± chlorite

Weathered greenish rock fragment

Tentatively altered basalt or serpentinite; exact identification requires testing

Weathered mica-rich schist

Muscovite–biotite schist, possibly quartz-bearing

Yellow Quartzite River Stone

Quartzite (SiO2)

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chert / Jasper

Silicon Dioxide (SiO2)

Small fossilized tooth, possibly a shark tooth

Indeterminate fossil tooth; species cannot be identified from this image

Small weathered rock fragment, possibly quartz-rich

Unidentified lithic fragment; species cannot be determined from the image

Fossil shark tooth

Likely fossilized shark tooth, possibly Carcharhinus or Otodus species

Iron-stained quartz-rich rock

Likely quartz-feldspar rock (granite or pegmatite) with iron-oxide staining

Quartz

Silicon Dioxide (SiO2)

Kidney Stone (Medical Specimen)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Gold-bearing Quartz / Auriferous River Rock

Lode Gold in Quartz Matrix (SiO2 + Au)

River Pebble (Gneiss or Quartzite variant)

Metamorphic rock specimen (likely Quartzite or Gneiss)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂ with minor iron-oxide staining and possible feldspar/mica

Weathered brown rock, possibly iron-rich sandstone or limonite

Tentative: ferruginous sandstone (quartz with iron oxides) or limonite/goethite-rich material

Rose Quartz in Matrix

Silicon Dioxide (SiO2) with traces of Titanium, Iron, or Manganese

Dumortierite Quartz

Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)

Sandstone (Ferruginous)

Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)

Mica (Biotite and Muscovite) in Matrix

Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)

Weathered porphyritic volcanic rock (possibly andesite)

Likely porphyritic andesite; exact identification requires closer examination