Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Gneiss

Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)

Weathered quartz-mica schist

Quartz–muscovite/biotite schist, locally iron-oxide stained

Likely tumbled greenstone (identity uncertain)

Greenstone: metamorphosed mafic volcanic rock, commonly composed of chlorite, actinolite, and epidote

Granite

Granite (composed of Quartz, Feldspar, and Mica)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Likely gneiss

Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole

Pink granite (likely weathered granite)

Granite, composed mainly of quartz, feldspar, and mica

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Dalmation Stone (often called Dalmatian Jasper)

Antiperthite-rich Microgranite

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Schist (likely mica schist)

Mica schist, commonly quartz–muscovite/biotite schist

Serpentine

(Mg,Fe)3Si2O5(OH)4

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Granite

Felsic intrusive igneous rock

Serpentinite

Serpentinite, composed chiefly of serpentine-group minerals (e.g., antigorite, lizardite, chrysotile)

Polished operculum (“Shiva eye” shell)

Calcium-carbonate shell operculum, commonly from a turban snail (family Turbinidae); not a mineral specimen

Ruby in Zoisite

Anyolite

Likely amphibolite

Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar

Granite

Granite (Phaneritic intrusive igneous rock)

Quartzite (River Pebble)

Meta-quartzite (composed primarily of SiO2)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Unakite (polished/tumbled)

Unakite, an epidote-altered granite composed chiefly of epidote, pink potassium feldspar, and quartz

Green-and-black mottled metamorphic rock (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite or lizardite); identification from the photo is provisional.

Chalk (or Soapstone Marking Stick)

Calcium Carbonate (CaCO3) / Hydrous Magnesium Silicate (Mg3Si4O10(OH)2)

Fossil Coral

Hexagonaria (Rugose coral) / Rugosa

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Chert (Jasper)

Silicon Dioxide (SiO2)

Quartz-rich rock, likely granite or quartz-bearing metamorphic rock

Undetermined; possibly granitic rock composed mainly of quartz and feldspar, with mica or other dark minerals

Lapis Lazuli

Complex rock composed mainly of lazurite, calcite, and pyrite

Red Sandstone

Arenite (primarily quartz with iron oxide cement)

Lapis Lazuli

Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)

Chert

Silicon dioxide (SiO2)

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Granite

Intrusive Igneous Rock

Pink Granite

Felsic intrusive igneous rock

Quartzite (specifically an iron-stained or Carnelian-colored variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Amphibolite

Amphibolite, composed mainly of amphibole (commonly hornblende) and plagioclase feldspar