Metamorphic Or Sedimentary Depending On Local Grade

Gneiss

Gneiss (High-grade metamorphic rock)

Pink Granite Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Greenschist

Chlorite schist

Garnet Schist

Almandine-Mica Schist

Greenschist

Chlorite schist

Fossilized Bored Limestone

Limestone with Ichnofossils (Gastrochaenolites or Entobia)

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Sandstone

Arenite (primarily SiO2)

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Puddingstone (Conglomerate)

Conglomerate (clastic sedimentary rock)

Rounded white pebble, likely quartz or feldspar

Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image

Garnet Gneiss

Gneiss containing Almandine Garnet

Red faceted gemstone, likely synthetic ruby

Corundum (Al₂O₃); ruby is red chromium-bearing corundum

Likely quartz-rich stone (possibly milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

Gneiss

Gneiss (High-grade metamorphic rock)

Biotite-bearing granite or granitic gneiss

Quartz–feldspar–biotite assemblage; possibly metamorphosed granite (gneiss)

Likely tiger’s-eye rough

Quartz-rich fibrous rock, chiefly SiO₂ with iron-oxide-stained crocidolite (riebeckite) fibers

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Garnet Schist

Almandine Garnet in Mica Schist

Chert (Jasper/Opaline variety)

Silicon Dioxide (SiO2)

Granitic Gneiss

Gneiss (high-grade metamorphic rock)

Rounded greenstone (likely serpentinite or chlorite-rich metamorphic rock)

Serpentinite/chlorite-actinolite schist; composition commonly dominated by serpentine-group minerals, chlorite, actinolite, magnetite, and minor iron oxides

Gneiss (Green Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Gneiss

Foliated Metamorphic Rock

Gneiss

Gneiss (Metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Gastropod Fossil (Snail Stone or Steinkern)

Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Dragon Blood Jasper

Epidote-containing Quartz and Chlorite (SiO2 + (Ca2(Al, Fe)3(SiO4)3(OH)))

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Red garnet-like faceted pendant

Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; identification is uncertain from the image

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly iron-stained massive quartz with minor feldspar or mica

Feldspathic Gneiss (Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Ruby ring (likely synthetic ruby)

Corundum, Al₂O₃; red color from chromium. The image alone cannot establish whether the stone is natural or lab-grown.

Charoite

(K,Sr,Ba,Na)15-16(Ca,Na)32[Si6O11(O,OH)2]2[Si12O18(O,OH)6]2[Si17O25(O,OH)18]2(OH,F)4 · nH2O

Granite

Intrusive Igneous Rock