Tiger's Eye (dark/grey variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Tiger's Eye
Silicon Dioxide (SiO2)
Mineral
Granite fragment
Granite (Felsic Plutonic Rock)
igneous
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Carnelian Agate / Iron-Stained Quartz
SiO2
Mineral
Dyed Agate Geode Slice
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Greasy Quartz (likely carved Milky Quartz or Aventurine)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (Iron-Stained)
Mafic Volcanic Rock (Basalt)
igneous
Anthracite Coal
Anthracite coal (High-rank coal)
sedimentary
Limestone (River Stone)
Calcium Carbonate (CaCO3)
sedimentary
Shark Tooth Fossil
Carcharodonta (order Lamniformes), likely Carcharias spp.
fossil
Anthracite Coal
Anthracite coal (High-rank coal)
sedimentary
Fossilized Oyster Shell
Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Jasper (SiO2, Silicon Dioxide with Iron inclusions)
sedimentary
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3, or Pyrite)
sedimentary
Chert (containing Orbicular/Agate patterns)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Opaque variety of Chalcedony/Quartz
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Pebble or Cobble (likely composed of sandstone or conglomerate)
Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)
Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
mineral
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Blue Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Fossil Brachiopod Cast (Atrypa species)
Phylum Brachiopoda, Class Rhynchonellata, Order Atrypida
sedimentary
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) - Opaque Chalcedony
sedimentary
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
Man-made material (constructed)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
mineral
Yellow Chert (Chert/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Lignite (Brown Coal)
Lignite (C189H155O6N3S)
sedimentary
Blue Apatite
Fluorapatite / Ca5(PO4)3F
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral