Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
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Blue Quartz
Silicon dioxide (SiO2) with inclusions
mineral
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst (Rose Quartz type)
SiO2 (Silicon Dioxide)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Ferrous Slag
Fused calcium-iron silicates (Industrial Slag)
Anthropogenic/Industrial byproduct
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Fluorite (often referred to as Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Vesicular Basalt (commonly mistaken for Slag)
Scoriaceous Basalt (composed primarily of Plagioclase Feldspar and Pyroxene)
igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite Pebble
Granite (Felsic Intrusive Igneous Rock)
igneous
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar)
igneous
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Blue Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
gemstone
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Rose Quartz (SiO2 with traces of Ti, Fe, or Mn)
mineral
Fluorite Geode
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Mixed Rock and Mineral Collection
Mixed Assemblage (includes Quartz, Jasper, Feldspar, and Turquoise-colored stones)
mineral
Pink Quartzite Pebble
Quartzite (SiO2)
metamorphic
Fluorite
Calcium fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Iron Slag
Anthropogenic pyrometallurgical byproduct
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Dendritic Jasper (Bumblebee like Agate)
Silicon Dioxide with inclusions (SiO2)
sedimentary