Mineral Based Composite

Diorite

Intermediate Phaneritic Igneous Rock

Sandstone Pebble

Arenite

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

Muscovite Mica

Muscovite, KAl2(AlSi3O10)(OH)2

Dendritic Chert

Silicon Dioxide with Manganese Oxide Inclusions (SiO2 + MnO2)

Garnetiferous Quartzite (Garnet Gneiss Pebble)

Garnet-bearing Quartzite or Quartz-Feldspar Gneiss

Olivine-bearing Basalt / Scoria

Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)

Granite

Course-grained intrusive igneous rock

Diorite

Phaneritic intermediate plutonic rock

Granitic Gneiss

Gneiss (High-grade Metamorphic Rock)

Granite

Granite

Fossilized Shark Tooth

Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)

Mica Schist with Quartz

Mica Schist (principally Muscovite and Biotite with Quartz veins)

Granite

Phaneritic Plutonic Felsic Rock

Labradorite

Plagioclase Feldspar (Ca,Na)(Al,Si)4O8

Labradorite

Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8)

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Moss Agate and Druzy Quartz Carving

Cryptocrystalline Silica (SiO2) with impurities

Citrine

Silicon dioxide (SiO2)

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Fossilized Tabulate Coral (Honeycomb Coral)

Favosites (Order: Tabulata)

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)

Mica (specimen appears to be Muscovite or Phlogopite)

Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Citrine Quartz Geode

Silicon Dioxide (SiO2) with iron impurities

Granite

Granite (Felsic Plutonic Rock)

Aura Quartz Geodes (Lab-Altered)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition

Plum Blossom Tourmaline

Tourmaline with Lepidolite (Na,Ca)(Li,Mg,Al)3Al6(BO3)3Si6O18(OH)4

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Mica (Lepidolite or Muscovite)

Phyllosilicate mineral (KAl2(AlSi3O10)(OH)2 for Muscovite)

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Molybdenite in Quartz

Molybdenite (MoS2) with Quartz (SiO2)

Blue Topaz

Topaz [Al2SiO4(F,OH)2]

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

Blue Sapphire

Corundum (Al2O3 with iron and titanium trace elements)

Biotite (Black Mica)

K(Mg,Fe)3AlSi3O10(OH,F)2