Metamorphic (Localized) Or Sedimentary

Banded Gneiss

Gneiss (variable mineral composition)

Red Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with Hematite impurities

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)

Quartz (SiO₂)

Slate with Red Sandstone Landscaping Rock

Foliated Pelitic Metamorphic Rock (Slate) and Ferruginous Sandstone

Zebra Jasper

Silicon Dioxide (SiO2) with various inclusions

Garnet (likely Almandine or a blend)

Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Veined Quartz

SiO2 (Silicon Dioxide)

Greenstone

Metamorphosed Mafic Igneous Rock

Quartz

Quartz (SiO2 - Silicon Dioxide)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Banded River Rock / Gneiss (highly weathered)

Gneiss

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 Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Banded Gneiss

Gneiss

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Quartz

Silicon Dioxide (SiO2)

River Stone (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) based metamorphosed sandstone

White Quartz

Quartz (SiO2)

Gneiss (likely)

Gneiss

Quartz (Pebble)

Quartz (SiO₂)

Banded Gneiss

Gneiss (pronounced "nice")

Corundum

Corundum (Al2O3)

Quartz

Silicon Dioxide (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Epidote in Quartz

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

Banded Rock (likely Quartz-rich)

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

Biotite Mica

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

Anthracite Coal

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

Jasper and Quartzite mix

Silicon Dioxide (SiO2) with impurities

Banded Gneiss

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

Quartz on Host Rock

Silicon Dioxide (SiO2)