Man Made Material (Simulated Mineral)

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Bauxite Ore

Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Red Jasper

Jasper (a cryptocrystalline variety of Quartz, SiO₂)

Diamond

Carbon (C), specifically in an isometric crystal system.

Quartz (pebble)

Quartz (SiO₂)

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Black Tourmaline (Schorl)

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Calcite

Calcite (CaCO3)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Citrine

Quartz (SiO2) - variety Citrine

Milky Quartz

Quartz (SiO₂)

Fossil Coral

Fossilized Scleractinia or Tabulata (various genera/species)

Amber

Amber (Fossilized Tree Resin)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Gold (Processed)

Gold (Au)

Caliche (also known as hardpan, calcrete, kankar)

Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.

Shale or Slate with Quartz Veins

Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Fossiliferous Rock (likely Dinosaur Fossil in Matrix)

Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)

Marble

Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).

Ocean Jasper

Orbicular Jasper (variety of Chalcedony - SiO2)

Rutilated Quartz

SiO2 (Quartz) with TiO2 (Rutile inclusions)

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Charoite

Charoite (Hydrated silicate of potassium, sodium, calcium, barium and strontium): (K,Sr,Ba)(Na,Ca)2[Si4O10](OH,f)·H2O

Leopard Skin Jasper

Chalcedony (cryptocrystalline quartz) with inclusions

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Halite

Halite (NaCl)

Quartz (milky quartz variety)

Quartz (SiO₂)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Tektite (likely Australite)

Tektite (no specific chemical formula as it's a natural glass of variable composition, mostly SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O, TiO2)

Granite (likely a river or beach pebble)

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

Pearls

Aragonite (calcium carbonate) and Conchiolin

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Basalt

Basalt

Granite (tumbled pebble)

Granite (Plutonic Igneous Rock)