Chert with Druzy Quartz Geode
Microcrystalline Quartz (SiO2)
sedimentary
Category
Organic (Non Rock)
Browse organic (non rock) specimens identified by the Rock Identifier community.
Learn about Organic (Non Rock) in the encyclopedia
View all →
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Black Obsidian
Volcanic Glass (Silicon Dioxide with impurities)
igneous
Siltstone
Siltstone (primarily SiO2, Al2O3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite River Cobble
Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Amber
Succinate (Organic Fossilized Resin)
mineraloid
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Quartzite pebble
Quartzite (SiO2)
metamorphic
Obsidian
Volcanic Glass (70% or more SiO2)
igneous
Quartzite with inclusions
Quartzite (SiO2)
metamorphic
Tumbled Black Jasper
Silicon Dioxide (SiO2) with iron and carbon inclusions
sedimentary
Slate with Quartz
Low-grade Metamorphic Slate with SiO2 inclusions
metamorphic
Zebra Stone (Silicified Siltstone)
Silicified Siltstone with Quartz/Kaolinite inclusions
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Amber
Succinite (amorphous organic polymer)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Riverstone Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Black Obsidian
Volcanic Glass (SiO2 + MgO / Fe3O4)
igneous
Quartzite River Cobble
Quartzite (SiO2)
metamorphic
Pyrite-bearing Schist
Pyritic Quartz-Mica Schist with FeS2 inclusion
metamorphic
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Quartzite
Metamorphic Quartzite
metamorphic
Obsidian
Volcanic Glass (70-75% SiO2)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Blue Dyed Quartzite
Silicon Dioxide (SiO2) with artificial pigment
metamorphic
Quartzite (with possible Iron staining)
Meta-orthoquartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Obsidian
Volcanic glass
igneous