Sedimentary Or Metamorphic (Base Substrate)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Copper-bearing Mica Schist

Mica Schist with Native Copper inclusions

Mica schist

Mica-rich schist, likely muscovite–quartz schist

Green Aventurine

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

Slate

Slate; predominantly fine-grained phyllosilicates (muscovite/illite, chlorite) with quartz and feldspar

Graphite

Graphite (Chemical Formula: C)

Golden mica schist

Mica-rich schist, likely muscovite schist (quartz and mica; exact minerals cannot be confirmed from the image)

Mica Schist

Crystalline Schist (often containing Muscovite, Biotite, and Quartz)

Likely biotite-rich mica schist

Mica schist, composed mainly of biotite and/or muscovite with quartz and feldspar

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist; principally muscovite mica, biotite, quartz, and feldspar

Dragon Blood Jasper

Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Biotite Gneiss

Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)

Likely mica schist

Mica-rich schist, likely muscovite–biotite schist; exact identification requires examination

Mica Schist with Pyrite

Muscovite/Biotite Schist (Complex Silicate)

Polished pink quartzite or jasper

Quartzite, predominantly SiO₂; possibly iron-stained jasper/chalcedony

Muscovite Mica Schist

Metamorphic rock rich in muscovite mica (KAl2(AlSi3O10)(F,OH)2)

Mica Schist

Schist (muscovite-biotite rich)

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Milky Quartz (Tumbled/Water-worn)

Silicon Dioxide (SiO2)

Schist (specifically Mica Schist)

Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)

Jasper

Silicon dioxide (SiO2)

Biotite-rich schist (likely mica schist)

Mica schist; predominantly quartz, biotite mica, and feldspar

Pyrite-bearing sulfide specimen

Pyrite (FeS₂), possibly with chalcopyrite and weathered sulfides

Quartzite pebble

Quartzite (SiO2 based)

Mica schist (likely biotite–muscovite schist)

Mica schist; chiefly quartz and mica minerals (muscovite KAl₂(AlSi₃O₁₀)(OH)₂ and/or biotite)

Graphite

Graphite (Native Carbon, C)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Tumbled quartz-rich rock, possibly calcite or sandstone

Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Tumbled quartz-rich carbonate rock

Likely massive quartz (SiO₂), possibly calcite-bearing marble or limestone

Weathered mica-rich metamorphic rock, likely schist

Mica schist, probably muscovite–biotite schist with quartz and feldspar

Quartz Vein in Gneiss or Schist

Metamorphic rock with SiO2 vein

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Fossilized oyster shell

Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite

Dark gray rock fragment, likely basalt

Basalt; chiefly plagioclase feldspar and pyroxene, commonly with minor olivine and magnetite

Biotite (Black Mica)

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

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities

Biotite schist (mica schist), possibly garnet-bearing

Mica schist; chiefly quartz (SiO₂), feldspar, and biotite mica, with possible garnet