Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Quartz on Matrix

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Desert Rose (Baryte/Gypsum Rosette)

Baryte (BaSO4) or Gypsum (CaSO4·2H2O)

Septarian Nodule (Septarian Dragon Stone)

Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Chert (or Flint)

Chert (Sedimentary Cryptocrystalline Sio2)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Nephrite Jade / Pounamu

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

River Quartzite / Tumble-Polished Quartz

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Beach Quartzite Pebble

Quartzite (primarily SiO2)

Turquoise (Rough Specimens)

Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Quartzite (River Pebble)

Metamorphic rock consisting primarily of Quartz (SiO2)

Gneiss (Metamorphic Cobble)

Gneiss (High-grade Regional Metamorphic Rock)

Anthracite Coal

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

Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with dendritic inclusions

Chert (Jasper/Flint Pebble)

Microcrystalline quartz (SiO2)

Quartzite

Quartzite

Unable to identify - Image contains non-geological items

Epidote

Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Basalt with Quartz/Feldspar Inclusion

Basalt (containing Silicate minerals such as SiO2 and (Ca,Na)(Al,Si)4O8)

Quartzite Cobble

Quartzite (primarily SiO2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Siltstone with Weathering Rind

Siltstone (composed of microscopic quartz and clay minerals)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Quartzite with Iron Inclusions

Metamorphosed Sandstone (SiO2 dominated)

Quartzite Pebble

Quartzite (SiO2)

Granite Pegmatite

Coarse-grained Granite (SiO2 - Aluminum and Alkalies)

Botryoidal Chalcedony (Desert Rose / Agate)

Silicon Dioxide (SiO₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Basalt

Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (complex of lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Quartzite

Quartzite (SiO2)

Quartzite with Mica schist fragment

Quartzite (SiO2) with Muscovite/Biotite Schist

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Quartzite (Iron-Stained Quartzite)

Quartzite (SiO2 with Fe2O3 trace impurities)