Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2)
sedimentary
Category
Mineralogical Specimen
Browse mineralogical specimen specimens identified by the Rock Identifier community.
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Chert (Jasper)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Tiger's Eye (Oeil de Tigre)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Quartzite River Rock
Metamorphic Quartzite (SiO2)
metamorphic
Raw calcite specimen
Calcite (calcium carbonate, CaCO₃)
mineral
Unknown White Specimen
Unidentifiable due to blurriness
mineral
Granite / Quartzite Specimen
Granite / Quartz (SiO2 with Feldspar and Mica)
igneous
Quartz / Feldspar Specimen
SiO2 (Quartz) / KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar Group)
mineral
Diamond (Cut Specimen)
Diamond (pure carbon, C)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Sugar variety)
Silicon Dioxide (SiO2)
mineral
Ferruginous Sandstone with Concretion
Sandstone (SiO2 dominated with Fe2O3 cement)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
mineral
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Fossil Coral and Quartz Pebble
Fossilized Anthozoa / Silicon Dioxide (Quartz)
sedimentary
Granite / Gneiss (Coarse-Grained Felsic Rock)
Granite (Quartz-Feldspar-Mica aggregate)
igneous
Banded Sandstone
Clastic Sandstone (SiO2 with iron oxides)
sedimentary
Chert / Flint
Silicon dioxide (SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
sedimentary
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Granite Porphyry
Phaneritic-Porphyritic Igneous Rock
igneous
Quartz (Milky or Smoky Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkosic)
Arenite (SiO2 with KAlSi3O8)
sedimentary
Banded Agate (Pink/White)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Sandstone (likely Quartzite-grade)
Arenite (primarily SiO2)
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Granite cobble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Quartz fragment
Silicon dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite (Coldwater or Druzy Quartz over Quartzite)
SiO2 (Silicon Dioxide)
metamorphic
Quartz (Microcrystalline variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
mineral
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead)
Chert (SiO2)
sedimentary
Silver (Native Silver Mineral)
Ag (Native Silver), Alloyed 90% Ag / 10% Cu
mineral