Anthropogenic Specimen (Man Made Material)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Igneous

Sandstone

Arenite (a specific type of sandstone with less than 15% matrix)

Sedimentary rock

Sandstone

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

Sedimentary Rock

Banded Iron Formation (BIF) / Tiger Iron variety

Banded Iron Formation (composed primarily of Magnetite Fe3O4, Hematite Fe2O3, and Chert/Quartz SiO2)

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

igneous

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Mineral/Rock

Quartz

Quartz (SiO₂)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Rose Quartz

Silicon Dioxide (SiO2)

Diamond

Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.

Schist

N/A (a rock type, not a mineral formula)

metamorphic

Chert with Asphaltum (or Tar)

Silica (SiO2) with natural Bitumen/Asphaltum

Seraphinite

Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Sedimentary Rock

Fluorite (translucent octahedral crystal)

Calcium fluoride (CaF2)

Orange Quartz (Citrine Quartz variety)

Silicon Dioxide (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Onyx (Black Onyx)

Silicon Dioxide (SiO2) - Chalcedony variety

igneous, sedimentary, metamorphic, and mineral

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Fluorite

Calcium fluoride (CaF2)

Fluorite

Calcium Fluoride (CaF2)

Fluorite

Calcium Fluoride (CaF2)

Mineral (specifically a mineraloid)

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)

Green Fluorite

Fluorite (Calcium Fluoride) - CaF2

Sedimentary Rock (as a residual soil/rock, it's often considered a type of sedimentary rock due to its formation from weathering, though it can cross into soil science)

Laterite

Laterite (primarily composed of hydrated oxides of iron and aluminum)

Porphyritic Rhyolite (Red Porp)

Porphyritic Rhyolite (Felsic volcanic rock)

igneous

Fluorite

Calcium Fluoride (CaF2)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Fluorite

Calcium Fluoride (CaF2)

Citrine or Yellow Quartz

Silicon Dioxide (SiO2) with iron impurities

White Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

Citrine

Citrine (Silicon Dioxide, SiO2)

Yellow Citrine Quartz

Silicon Dioxide (SiO₂)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)