Sedimentary Or Metamorphic (Base Substrate)

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite

Granite (Phaneritic Acidic Igneous Rock)

Granodiorite

Phaneritic Granodiorite

Basalt

Extrusive mafic igneous rock

Basalt (Gravel Pebble)

Basalt (contains pyroxene, plagioclase feldspar, and olivine)

Granite

Granite (Alkali-feldspar, Quartz, and Plagioclase composition)

Granite Cobble

Granite (Felsic Intrusive)

River Pebble (Gabbro or Dark Sandstone variety)

Mafic Intrusive Rock (Plagioclase Feldspar and Pyroxene)

Blue Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

White Topaz

Al2SiO4(F,OH)2

Basalt with Quartz Veins

Vesicular or aphanitic Basalt with SiO2 (Quartz) intrusions

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Pink Granite

Phaneritic Plutonic Igneous Rock (composed of K-feldspar, Quartz, and Mica)

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Garnet

Almandine-Pyrope group, X3Y2(SiO4)3

Sunstone

Oligoclase (Plagioclase Feldspar), (Na,Ca)(Si,Al)4O8

Moss Agate and Druzy Quartz Carving

Cryptocrystalline Silica (SiO2) with impurities

Snowflake Obsidian

Volcanic glass (SiO2) with Cristobalite (SiO2) inclusions

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Snowflake Obsidian

Volcanic glass containing Cristobalite (SiO2)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Quartz Pebble

Silicon Dioxide (SiO2)

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.

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Quartz (SiO₂)

Granodiorite / Granite

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Rhodonite

Rhodonite (Mn, Fe, Mg, Ca)SiO3

Veined Quartz

SiO2 (Silicon Dioxide)

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

Epidote in Quartz

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

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

Quartz (SiO2 - Silicon Dioxide)

Aura Quartz (Rainbow Quartz)

Silicon Dioxide (SiO2) with metallic vapor coatings

K2 Jasper (K2 Granite)

Azurite in Granite (K(Mg,Fe)3AlSi3O10(OH,F)2 + Cu3(CO3)2(OH)2)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Bloodstone (Heliotrope)

Silicon dioxide (SiO2) with Hematite inclusions

Citrine (likely Heat-Treated Amethyst)

Silicon Dioxide (SiO2)