Metamorphic Or Igneous

Schist

Schist (metamorphic rock)

Quartzite Cobble with Quartz Vein

Metamorphic Quartzite (SiO2)

Marble

Metamorphic Limestone (CaCO3)

Quartzite Pebble

Metamorphic Quartz (SiO2)

Slate

Foliated Metamorphic Rock

Quartzite Pebble

Metamorphic Quartz (SiO2)

Quartzite

Metamorphic Quartz (SiO2)

Quartzite Pebble

Metamorphic Quartz (SiO2)

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Quartzite pebble

Metamorphic Quartz (SiO2)

Slate

Slate (Metamorphic Rock)

Quartzite Cobble

Metamorphic Quartzite (SiO2)

Gneiss

Gneiss (a metamorphic rock)

Quartzite

Metamorphic Quartz (SiO2)

Slate

Foliated metamorphic rock

Quartz

Quartz (SiO₂)

Slate

Foliated Metamorphic Rock (composed mainly of clay minerals or micas)

Sapphirine in Matrix

Sapphirine (Mg,Al)8(Al,Si)6O20

Pink Rhodonite

Manganese Silicate (MnSiO3)

Rhodonite

Rhodonite (MnSiO3)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Limonite (Iron Ore/Hydrated Iron Oxide)

Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))

Citrine

Quartz (SiO2) - variety Citrine

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

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 (River Rock/Pebble)

Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)

Eclogite

Eclogite (Omphacite + Pyrope)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Epidote in Matrix (likely Amphibolite or Gneiss)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Rhodonite

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

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Almandine Garnet in Schist

Almandine, Fe3Al2(SiO4)3

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Smoky Quartz

SiO2 (Silicon Dioxide)