Mineralogical Specimen

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Porphyritic Rhyolite or Andesite (Porphyry)

Porphyritic igneous rock (Composition depends on exact mineralogy, often Rhyolite or Andesite)

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

Likely small metallic meteorite fragments

Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image

Polished pale stone, likely limestone or quartzite pebble

Most consistent with micritic limestone (calcite, CaCO₃), though the image cannot confirm mineralogy

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Greisen

Greisen

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Banded Gneiss

Gneiss (pronounced 'nice')

Banded Sedimentary Rock

Sedimentary rock with Liesegang banding

N/A

Tektite (Indochinite)

Tektite (High-silica natural glass)

Not a geological specimen

N/A (man-made object)

Unable to Identify (Image Obscured)

Quartz geode or druzy quartz specimen

Quartz, silicon dioxide (SiO₂), likely microcrystalline/drusy quartz coating a host rock

Desert Rose (Gypsum Rose / Barite Rose)

Calcium Sulfate Dihydrate (CaSO4·2H2O) or Barium Sulfate (BaSO4) with Sand inclusions

River Stones (Basalt and Sedimentary Rock)

Basalt (dark specimen) and Siltstone/Mudstone (reddish specimen)

Gray slate

Slate; fine-grained foliated metamorphic rock composed mainly of mica and quartz

Copper Ore Specimen

Cupriferous Rock / Malachite-bearing ore

Vesicular volcanic rock, likely pumice or scoria

Pumice/scoria; predominantly volcanic glass with plagioclase, pyroxene, and/or olivine

Painted River Rock

Anthropogenic-modified Siliciclastic Sedimentary Rock

Fragmented Sedimentary Pebble

Clastic Sedimentary Specimen

Fossilized Bivalve Shell

Bivalvia (fossil specimen)

Rock Specimen

Unclassified rock specimen

Generic Rock / Pebble

Undetermined rock specimen

Fossilized Shark Tooth (Root Portion)

Selachimorpha (partial specimen)

Note on Image Identification: Textile

N/A (Anthropogenic material)

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix

Geodal Limestone / Calcite Druze

Calcium Carbonate (CaCO3)

Trilobite Fossil in Limestone

Trilobita (Class), likely embedded in fossiliferous limestone (CaCO3)

Quartz with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with inclusions

Agate

Silicon Dioxide (SiO2)

Gold Ore in Quartz

Auriferous Quartz (Au + SiO2)

Quartz geode (likely amethyst-bearing geode)

Microcrystalline quartz and drusy quartz; SiO₂, with possible iron-stained or amethyst quartz

Common Opal

SiO2·nH2O (Hydrated Silicon Dioxide)

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Tumbled red jasper and blue-green turquoise (likely dyed or stabilized)

Red jasper: microcrystalline quartz, SiO₂, colored by iron oxides; turquoise: hydrated copper-aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Quartz pebble or seed/crumb

SiO2 (if quartz)

Echinoidea (Fossil Sea Urchin)

Echinodermata Echinoidea

Polished mahogany obsidian (probable)

Volcanic glass; chiefly rhyolitic silica-rich glass (SiO₂), compositionally near rhyolite