Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Olivine (Peridot in gem form)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Mica Schist

Muscovite/Biotite Schist

Charoite

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

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Granite

Granite (a common rock type, not a single mineral species)

Fluorite with Rhodochrosite

Fluorite (CaF2) and Rhodochrosite (MnCO3)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

Calcite

Calcite (Mineral; CaCO₃)

Epidote with Unakite characteristics

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Serpentine

Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Goethite

Rose Quartz

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

Rose Quartz

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

Green Fluorite

Calcium Fluoride (CaF2)

Dalmatian Jasper (Dalmatian Stone)

Perthitic feldspar with Arfvedsonite inclusions

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Megalodon Shark Tooth Fossil

Otodus megalodon (fossilized in sedimentary matrix)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Ironstone Concretion (Moqui Marble variety)

Ferruginous Sandstone Concretion

White Chalcedony (likely Common Opal or Milky Quartz)

Silicon Dioxide (SiO2)

Geode (unopened)

Calcedony-lined Geode (SiO2)

Turquoise (likely Sleeping Beauty variety or treated Howlite imitation)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Limonite (Ironstone)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Milky Quartz with Mica (Gneiss/Schist influence)

Silicon Dioxide (SiO2) with Phyllosilicates

Milky Quartz

Silicon Dioxide (SiO2)

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Quartz (Smoky/Grey Variety)

Silicon Dioxide (SiO2)

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Shale

Shale (clastic sedimentary rock)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Schist (Garnet-Mica Schist)

Garnetiferous Mica Schist (primarily Muscovite/Biotite and Almandine Garnet)

Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Quartz (Quarzite or Massive Quartz vein)

Silicon Dioxide (SiO2)