Granodiorite
Granodiorite
igneous
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
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Sandstone
Clastic sedimentary rock (quartz arenite)
sedimentary
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Sandstone
Arenite (primarily Quartz and Feldspar composition)
sedimentary
Sandstone
Arenite (primarily Quartz-based)
sedimentary
Sandstone
Arenite
sedimentary
Red Sandstone
Ferruginous Sandstone (formula varies, primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Coprolite
Fossilized Feces
fossil
Fossiliferous Sandstone / Fossil Fragment
Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material
fossil
Jasper
Microcrystalline Quartz (SiO2)
Sedimentary/Mineral
Yellow calcite crystal cluster with calcite fragment
Calcite, calcium carbonate (CaCO₃)
mineral
Rough Blue Diamond
Carbon (C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Diamond (Faceted Gemstone)
Native Carbon (C)
mineral
Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
igneous
Tumbled quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Ti, Fe, or Mn
mineral
Mixed tumbled gemstone collection
Varied minerals, likely including amethyst, sodalite/lapis lazuli, quartzite or aventurine, jasper, and agate/chalcedony
gemstone
Granite
Felsic intrusive igneous rock
igneous
White Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled ocean jasper or orbicular jasper
Microcrystalline quartz (SiO₂), commonly with chalcedony, feldspar, and iron-oxide inclusions
mineral
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Felsic Tuff
Pyroclastic volcanic rock (Tuff)
igneous
Blue-dyed howlite beads (likely)
Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise
mineral
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Tumbled rose quartz
Quartz (SiO₂), pink variety
mineral
Sandstone
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (Red Sandstone)
Arenite
sedimentary
Diamond
Carbon (C)
gemstone
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (SiO₂), potentially quartzite if the grains are fused
mineral
Flint
Silicon dioxide (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Mineraloid
Quartz and Mixed Sedimentary Rocks
Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies
sedimentary