Mineral With Metamorphic Or Igneous Host

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Gold-bearing Quartz

Lode Gold in Silicon Dioxide (SiO2)

Pink faceted gemstone, likely synthetic cubic zirconia or pink sapphire

Uncertain from image; possible zirconium dioxide (cubic zirconia, ZrO₂) or corundum (pink sapphire, Al₂O₃)

Rough Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Emerald in Matrix

Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Pegmatite with Quartz and Feldspar

Intrusive Igneous Rock

Sandstone (Micaceous Sandstone)

Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Quartz-veined dark metamorphic rock

Likely quartz-mica schist or foliated basalt with a quartz vein

Magnetite Ore

Magnetite (Fe3O4)

Milky quartz with dark host-rock inclusions

Quartz (SiO₂), likely in a granitic or metamorphic matrix

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Likely garnet-bearing rock fragment

Garnet-bearing schist or gneiss; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃

Milky Quartz

Silicon Dioxide (SiO2)

Green beryl gemstone (likely emerald or green beryl)

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium or iron

Ruby (Raw Corundum)

Corundum (Al2O3:Cr)

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Epidote and Quartz in Basalt Porpohyry

Epidote bearing Porphyritic Basalt with Quartz Veins

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Amethyst

SiO2 (Silicon Dioxide)

Native Silver Nugget

Silver (Ag)

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartz with Schist Matrix

Crystalline Silicon Dioxide (SiO2) in micaceous schist

Pegmatite

Pegmatite (felsic intrusive igneous rock)

Muscovite on Quartz (Mica host rock)

KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)

Quartz in Host Rock

Silicon Dioxide (SiO2) in Rhyolite or Granite matrix

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Geode or Crystalline Quartz Node

Silicon Dioxide (SiO2)

Yellow Aventurine

Silicon Dioxide (Quartz with inclusions), SiO2

Rose Quartz

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

Peridot in Basalt

Olivine ((Mg, Fe)2SiO4) in Basalt

Copper-bearing basalt or volcaniclastic rock

Cuprite–malachite-bearing mafic volcanic rock; likely basalt with copper sulfides/oxides

Pegmatite with muscovite mica

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and muscovite mica [KAl₂(AlSi₃O₁₀)(OH)₂]

Pyrite-bearing rock (likely pyrite-rich schist or quartzite)

Pyrite, FeS₂, disseminated in a metamorphic host rock

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining

Fuchsite Gneiss or Schist

Muscovite (variety Fuchsite) within Metamorphic Host Rock

Yellow Quartz or Citrine Quartz

Silicon Dioxide (SiO2)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Emerald with Matrix (Emerald in Mica Schist)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Milky Quartz

Silicon Dioxide (SiO2)