Metamorphic Or Sedimentary (With Staining)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Zebra Jasper

Silicon Dioxide (SiO2) with various inclusions

Jasper with Epidote Vein

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Yellow Jade (often Serpentine or Dolomite)

Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.

Quartz

Quartz (SiO₂)

Banded River Rock / Gneiss (highly weathered)

Gneiss

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Banded Gneiss

Gneiss

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

River Stone (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) based metamorphosed sandstone

White Quartz

Quartz (SiO2)

Quartz (Pebble)

Quartz (SiO₂)

Quartz

Silicon Dioxide (SiO₂)

Gneiss (likely)

Gneiss

Corundum

Corundum (Al2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Biotite Mica

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

Epidote in Quartz

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

Banded Gneiss

Gneiss (pronounced "nice")

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Jasper and Quartzite mix

Silicon Dioxide (SiO2) with impurities

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Pyrite

Pyrite (FeS2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Quartzite

Quartzite (specifically a variety enriched with blue-coloring minerals)

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Greenstone / Chert

Cryptocrystalline Quartz (SiO2) or Altered Basalt

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Graphite

Graphite (Carbon, C)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (SiO₂)