Mineral (Man Made Composite)

Limestone with Quartz/Calcite Veins

Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)

Geode with Iron-Stained Quartz/Calcite

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix

Psilomelane (Black Hematite/Manganese Ore)

Barium Manganese Oxide (Formula: BaMn9O18(OH)4)

Amygdaloidal Basalt

Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)

Milky Quartz

Silicon Dioxide (SiO2)

Pink Granite

Granite (Felsic Plutonic Rock)

Porphyritic Rhyolite

Porphyritic Rhyolite (SiO2)

Granite Cobble

Phaneritic Felsic Igneous Rock

Basalt with Quartz Vein

Basalt (extrusive igneous rock) with Quartz (SiO2) inclusion

Green Aventurine

Aventurine Quartz (SiO2 containing Fuchsite)

Greenstone

Greenschist

Granite

Phaneritic Felsic Igneous Rock

Quartz with Mica inclusions (likely Schist or Gneiss host)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Quartz Pebble

Silicon Dioxide (SiO2)

Garden Quartz (Lodolite)

Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2) with Quartz (SiO2) inclusions

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Green Aventurine

Silicon dioxide with Fuscite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Moonstone

Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Pyrite

Iron Disulfide (FeS2)

Dyed Agate

Silicon Dioxide (SiO2) with artificial colorants

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Carnelian

Carnelian Agate (Silica: SiO2)

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Basalt with Quartz Vein and Weathering Crust

Amygdaloidal or Porphyritic Basalt

Magnetite (in matrix)

Magnetite (Fe3O4)

Laterite

Laterite (no specific mineral formula as it's a rock type)

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Diamond

Diamond (pure carbon, C)

Granite

Granite

Granite

Phaneritic Plutonic Felsic Rock

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite