Mineral (Evaporite)

Granite

Granite (silica-rich intrusive igneous rock)

Pyromorphite on Epidote

Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]

Schist

Mica Schist

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite

Granite (compositional mixture of Quartz, Feldspar, and Mica)

Milky Quartz (Water-Worn Pebble)

Silicon Dioxide (SiO2)

Magnetite with Pyrite or Chalcopyrite inclusions

Magnetite (Fe3O4) with Pyrite (FeS2)

Sandstone (River Cobble)

Clastic Sedimentary Rock (primarily Quartz with Feldspar)

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Diamond (set in Gold)

Carbon (C)

Granitic Gneiss

Gneiss (containing Potassium Feldspar and Quartz)

Smoky Quartz on Feldspar (Granite Pegmatite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

Granite Cobble

Felsic Intrusive Igneous Rock (Granite)

Granite

Intrusive igneous felsic rock

Banded Gneiss with Quartz Vein

Foliated Metamorphic Rock (Gneiss)

Diamond (in Jewelry Setting)

Carbon (C) - Isometric-Hexoctahedral

Granite

Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))

Diamond (or Lab-Grown Cubic Zirconia)

Carbon (C)

Milky Quartz with inclusions

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Granite

Phaneritic plutonic rock (Felsic)

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Sedimentary rock with quartz veining

Laminated siltstone or mudstone with hydrothermal quartz veins

Granite

Granite

Megalodon Shark Tooth Fossil

Otodus megalodon

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Granite

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

Gneiss

Gneiss

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Granite (Micro-specimen)

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

Schist (Diamond Drill Core)

Mica Schist

Aventurine (Green Quartz)

Quartz with Fuchsite inclusions (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)

Red Sandstone

Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist