Metamorphic Mineral

Schist with Biotite Inclusion

Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Mica Schist (with Golden/Biotite inclusions)

K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Unakite

Epidotized Granite

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Garnet in Matrix (Eclogite)

Eclogite, featuring Almandine or Pyrope Garnet [X3Y2(SiO4)3]

Mica Schist

Schist (Muscovite/Biotite Schist)

Quartzite

Quartzite (primarily SiO2)

Milky Quartz

Quartz (SiO₂)

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Weathered Quartzite or Chert Pebble

Silicon Dioxide (SiO2)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Marble (White)

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Amethyst

Quartz (SiO2) variety

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Quartz

Silicon Dioxide (SiO2)

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

White Marble

Metamorphosed Limestone (principally CaCO3)

Smoky Quartz

SiO2 (Silicon Dioxide)

Quartz

Quartz (SiO2)

Quartz

Silicon dioxide (SiO₂)

Blue Lace Agate

Chalcedony (a form of Quartz) - SiO2

Orange Calcite

Calcite (CaCO3)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

Red Quartzite River Stone

Metamorphic Rock (composed mainly of Quartz, SiO2)

Quartzite (Milky)

Metamorphic rock predominantly composed of Quartz (SiO2)

Slate

Slate (Low-grade foliated metamorphic rock)

River Pebble (Likely Quartzite or Chalcedony)

Silicon Dioxide (SiO2) - granular metamorphic variety

Anthracite Coal

Anthracite (Carbon-based sedimentary-metamorphic rock)

Pink Quartzite Pebble

Metamorphic Quartzite (SiO2 with iron oxide inclusions)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Jadeite and Nephrite (Jade)

Sodium Aluminum Silicate (Jadeite) / Calcium Magnesium Iron Silicate (Nephrite)

Quartzite (River Pebble)

Metamorphic rock consisting primarily of Quartz (SiO2)

Iron-stained Quartzite

Metamorphic Quartz (SiO2) with limonite/hematite staining

Lapis Lazuli

Lazurite-rich metamorphic rock (complex silicate)

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

Peridot (Olivine)

Olivine ((Mg,Fe)2SiO4)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Gneiss

Gneiss

Aventurine (likely Green Aventurine)

Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)