Igneous Or Metamorphic

Red Quartzite River Stone

Metamorphic Rock (composed mainly of Quartz, SiO2)

Quartzite (Milky)

Metamorphic rock predominantly composed of Quartz (SiO2)

Quartzite with Quartz Geode / Vug

Crystalline Silicon Dioxide (SiO2) in Metamorphic Host

Mica Schist

Mica Schist (Intermediate-grade Metamorphic Rock)

Slate

Slate (Low-grade foliated metamorphic rock)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

River Pebble (Likely Quartzite or Chalcedony)

Silicon Dioxide (SiO2) - granular metamorphic variety

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Banded Gneiss (River Cobble)

Gneiss (High-grade regional metamorphic rock)

Anthracite Coal

Anthracite (Carbon-based sedimentary-metamorphic rock)

Pink Quartzite Pebble

Metamorphic Quartzite (SiO2 with iron oxide inclusions)

Granite and Igneous Mix

Phaneritic Felsic to Mafic Intrusive Rocks

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Jadeite and Nephrite (Jade)

Sodium Aluminum Silicate (Jadeite) / Calcium Magnesium Iron Silicate (Nephrite)

Biotite Schist

Biotite Schist

Quartzite (River Pebble)

Metamorphic rock consisting primarily of Quartz (SiO2)

Mica Schist

Foliated Metamorphic Rock (rich in Muscovite or Biotite)

Iron-stained Quartzite

Metamorphic Quartz (SiO2) with limonite/hematite staining

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartzite with Iron Inclusions

Metamorphic Quartzite (SiO2 with Fe2O3 trace impurities)

Marble (Carrara style)

Recrystallized Calcite-rich Metamorphic Rock (CaCO3)

Granite Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Lapis Lazuli

Lazurite-rich metamorphic rock (complex silicate)

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within a metamorphic matrix

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

Serpentinite

Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4

Aquamarine

Beryl (Be3Al2Si6O18)

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Yellow Aventurine

Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)

Aventurine (Green Quartz)

Quartz with Fuchsite inclusions (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Aquamarine

Beryl (Be3Al2Si6O18 with Fe2+ trace elements)

Granite

Granite (Mainly Quartz, Feldspar, and Mica/Amphibole)

Porphyritic Rhyolite (Birdseye Rhyolite)

Rhyolite (Porphyritic texture)

Marble

Recrystallized Calcite (CaCO3)

White Marble

Recrystallized Calcite (CaCO3)

Schist (Micaceous Schist)

Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)