Quartz (with iron oxide staining)
Silicon Dioxide (SiO2)
mineral
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
Learn about Man Made Glass in the encyclopedia
View all →
Sandstone
Arenite (composed of SiO2, CaCO3, or iron oxides)
sedimentary
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
mineral
River Cobble (likely Quartzite)
Metamorphosed Sandstone (SiO2)
metamorphic
Quartz (Common Grains)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
igneous
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
River Quartz Cobble
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Sandstone (with Manganese staining)
Arenite (composed primarily of SiO2)
sedimentary
Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Peridot
Olivine ((Mg, Fe)2SiO4)
gemstone
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Citrine
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Cream Quartz Bead
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Quartz (Silicon Dioxide) - SiO2
mineral
Faceted Diamond or Cubic Zirconia
Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Limestone
CaCO3 (Limestone)
sedimentary
Quartz
Silicon dioxide (SiO2)
Mineral
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
mineral
Coal
Bituminous or Anthracite coal (carbon-rich sedimentary rock)
sedimentary
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Obsidian
Volcanic Glass (SiO2)
igneous