Mineral And Metamorphic Rock

Quartz (Milky/Vein Quartz)

Silicon Dioxide (SiO2)

Banded Slate

Metamorphic Argillite / Slate

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Quartzite Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

River Cobble (Salt and Pepper Gneiss)

Gneiss (High-grade regional metamorphic rock)

Quartzite with Hematite

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)

Quartzite Pebble (with possible inclusion)

Metamorphosed Quartz Sandstone (SiO2 with impurities)

Blue Apatite

Calcium Fluorophosphate - Ca5(PO4)3F

Quartzite with Schist Inclusions

Metamorphosed Quartzite (SiO2) with minor mica/chlorite schist

Banded Gneiss

Gneiss (variable mineral composition)

Schist

Lepidoblastic Mica Schist

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Blue Sapphire (Raw)

Corundum (Al2O3)

Quartz / Vein Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss

Gneiss

Quartzite pebble with Mafic inclusions

Quartzite (SiO2)

Gold Ore

Native Gold (Au) in Matrix

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), with possible mica or iron-oxide impurities

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

Schist (Biotite/Mica Schist)

Medium-grade regional metamorphic rock (rich in Phyllosilicates)

Garnet-Bearing Schist

Almandine Garnet Schist

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Small rounded pebble, likely quartz-rich stone

Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble

Weathered quartz-rich cobble, possibly milky quartz with iron staining

Quartz (SiO₂), likely with iron-oxide/hydroxide coatings and minor host-rock inclusions

Polished green aventurine (likely)

Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Banded Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Likely quartz fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock

Serpentinite

Serpentinite (composed primarily of mineral group (Mg,Fe,Ni,Al)3Si2O5(OH)4)

Nuummite

Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)

Blue Quartzite

Metamorphic Rock (rich in Quartz, SiO2 with inclusions of Dumortierite or Magnesio-riebeckite)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Greenstone

Greenschist (Metamorphosed Mafic Rock)

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Eclogite

Eclogite (Pyrope garnet and Omphacite pyroxene)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Greenstone

Greenschist / Meta-basalt