Mineral, Often Found As A Rock (Metamorphic)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

Chert (Cherty Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Quartz with Mica inclusions (likely Schist or Gneiss host)

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

Nephrite Jade

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

Chert (Nodule)

Microcrystalline Silica (SiO2)

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Glaucophane Schist (Blueschist)

Blueschist (Glaucophane-bearing schist)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Chert (Field Stone)

Chert (SiO2)

Lapis Lazuli (Raw Ore)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Tiger's Eye

Pseudomorph of Crocidolite (SiO2 with iron oxides)

Gemstone Sand (Mineral Assortment)

Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)

Ruby

Corundum (Al2O3 with Chromium impurities)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Chert (White Chert/Flint)

Chert (SiO2)

Chert (Mudstone)

Microcrystalline Quartz (SiO2)

Quartz

Silicon dioxide (SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Diorite (Spotted or Dalmatian Stone pattern)

Diorite

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Sandstone (Micaceous Sandstone)

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

Banded Gneiss (River Cobble)

Gneiss (a high-grade metamorphic rock)

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

Unakite

Unakite (Epidotized Granite)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Greenschist

Greenschist (chlorite-epidote schist)

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Schist

Mica Schist

Epidote in Quartz

Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)

Gneiss

Gneiss (High-grade Metamorphic Rock)