Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Category
Mineral (Native Element Alloy)
Browse mineral (native element alloy) specimens identified by the Rock Identifier community.
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Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
mineral
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Jadeite
NaAlSi2O6; Jadeite silicate mineral
metamorphic
Petrified Wood
Silicified wood (primarily quartz, SiO2)
sedimentary
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Basalt
Basalt
Igneous
Weathered quartz-rich pebble, possibly milky quartz or chalcedony
Quartz, SiO₂; exact variety uncertain from the image
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled/Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Polished/tumbled jasper, likely ocean jasper or brecciated jasper
Jasper: microcrystalline quartz (SiO₂) with iron oxides and other silicate impurities
mineral
Wollastonite
Calcium Inosilicate Mineral, CaSiO3
mineral
Mica (Biotite or Phlogopite Buchsam)
Silicate Mineral (Phyllosilicate family)
mineral
Spherulitic Agate / Moss Agate
Chalcedony (SiO2) with mineral inclusions
mineral
Dendritic Agate or Moss Agate Nodules (Septarian-like)
Chalcedony with mineral inclusions (SiO2)
sedimentary
Vesicular Basalt (Amygdaloidal Basalt)
Basalt with Secondary Mineral Inclusions
igneous
Pearl
Organic Mineral (CaCO3 with conchiolin)
mineral
Chert (Jasper variation)
Chert (Silicate mineral, SiO2)
sedimentary
Banded Gneiss
Gneiss (variable mineral composition)
metamorphic
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Aragonite
Aragonite (Carbonate mineral), CaCO3
mineral
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
sedimentary
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Carnelian
Carnelian (Silicate mineral, SiO2)
mineral
Amethyst
Amethyst (Silica mineral, SiO2)
mineral
Sandstone
Sandstone (various mineral compositions)
Sedimentary
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Red Jasper
Jasper (Silicate Mineral - SiO2)
sedimentary
Schist
Schist (various mineral compositions)
metamorphic
Quartzite Pebble
Quartzite (SiO2) with mineral inclusions
metamorphic
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Fossilized Echinoid (Sea Urchin) or Brachiopod
Echinoidea / Invertebrate Fossil
fossil
Weathered banded sandstone pebble
Quartz-rich sandstone (predominantly SiO₂)
sedimentary
Gabbro or Diorite with Quartz/Epidote Vein
Intrusive Igneous Rock (Plutonic)
igneous