Quartz
Silicon dioxide (SiO2)
Category
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
Quartz
Silicon dioxide (SiO2)
Iron-stained metamorphic rock, likely quartzite or jasper
Quartz-rich rock dominated by SiO₂, with iron oxides/hydroxides (hematite, goethite) and possible clay or mica
Clear Quartz
SiO2 (Silicon Dioxide)
Pink Quartz
Silicon Dioxide (Quartz), SiO2
Mica
Mica group (often Muscovite or Biotite)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (SiO2)
Quartzite Beach Pebble
Quartzite (primarily SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Quartz (Pebble)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
Tumbled milky quartz (probable)
Quartz, silicon dioxide (SiO₂)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Likely polished gray quartzite or chert
Quartzite, predominantly microcrystalline SiO₂; possibly gray chert (chalcedony/quartz)
Quartz Pebble
Silicon Dioxide (SiO2)
Feldspar
Feldspar (Orthoclase/Microcline)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz pebble
Silicon dioxide (SiO2)
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
Green Aventurine
SiO2
Quartz
Silicon Dioxide (SiO2)
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Quartz (Pebble)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz with Inclusions
Silicon Dioxide (SiO2)
Clear Quartz (Faceted Crystal)
Silicon Dioxide (SiO2)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Agate
Silicon Dioxide (Chalcedony), SiO2
Quartz Pebble
Silicon Dioxide (SiO2)