Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Igneous And Metamorphic Derivative (Weathered)
Browse igneous and metamorphic derivative (weathered) specimens identified by the Rock Identifier community.
Blue Quartz
Quartz (Silicon Dioxide) with blue inclusions (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Epidote (likely Pistacite in Epidosite rock)
Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Mica-rich Sandstone or Micaceous Schist Weathering
Micaceous Schist (Muscovite-Quartz composition)
Metamorphic or Sedimentary depending on local grade
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite (specifically a river-worn cobble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Pink Quartzite Pebble
Metamorphic Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Quartzite Fragment
Silicon Dioxide (SiO2)
mineral / metamorphic
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Slate
Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)
metamorphic
Smoky Quartz (Apache Tear Variety)
Silicon dioxide (SiO2) - Volcanic Glass
igneous
Pyrite (on Quartz/Sulfide matrix)
Iron Sulfide (FeS2)
mineral
Basalt (Gravel Pebble)
Basalt (contains pyroxene, plagioclase feldspar, and olivine)
igneous
Basalt
Basalt (composition of plagioclase feldspar, pyroxene, and olivine)
igneous
Quartzite with Iron inclusions
Metamorphosed Sandstone (SiO2 with Fe2O3)
metamorphic
Quartzite Pebble (Beach Pebble)
Quartzite (primarily SiO2)
metamorphic
Granodiorite (River Pebble)
Granodiorite
igneous
Quartz (Milk Quartz Cobble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz River Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
River Quartzite (or Quartz Cobble)
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral, often found as detrital grains in sedimentary rocks
Cloudy Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Diabase (Greenstone)
Diabase (also known as Dolerite)
igneous
Amethyst (Purple), Sulfur (Yellow), and Blue Apatite
SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)
mineral
Lemon Quartz (Orizaba/Citrinated Quartz)
Silicon Dioxide (SiO2) with iron impurities/treatment
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite (Iron-stained Quartz)
Silicon Dioxide (SiO2) with iron oxide staining
metamorphic
Riverstone Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz (River Cobble)
Silicon Dioxide (SiO2)
mineral
Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Quartz / Common Agate
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral