Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Category
Mineraloid Like Synthetic Material
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
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Sunstone (Aventurine Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Pebble)
Sandstone
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Aura Quartz Bead
Silicon dioxide (SiO2) with metal coating
mineral with artificial coating
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Unakite Mushroom Carving
Altered Granite (Epidote, Pink Orthoclase Feldspar, and Quartz)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Unakite-like granite
Altered granite, chiefly quartz, feldspar, mica, and red garnet
igneous
Fossiliferous Limestone containing a Brachiopod or Mollusk Impression
Biogenic Sedimentary Rock / Fossiliferous Limestone
sedimentary
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
mineral
Chert (and its variety Flint)
Silicon Dioxide (SiO2) - Microcrystalline or cryptocrystalline Quartz
sedimentary
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
sedimentary
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (containing Flint nodules)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Limestone (with crushed gravel)
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Serpentine
Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Red Sandstone
Arenite (with Iron Oxide cement)
sedimentary
Chert / Flint
Chert (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amygdaloidal Basalt with Epidote
Vesicular Basalt with secondary Epidote/Quartz mineral infill
igneous
Scoria
Extrusive Basaltic Scoria
igneous
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Vesicular basalt (scoria-like volcanic rock)
Vesicular basalt; commonly composed of plagioclase, pyroxene, olivine, and volcanic glass
igneous
Diorite
Intermediate plutonic igneous rock
Igneous
Chert (Flint)
Chert (SiO2)
sedimentary
Weathered quartz-rich rock, possibly granite or pegmatite fragment
Uncertain; likely quartz–feldspar aggregate, potentially granitic pegmatite
igneous
Amber
Amber (Fossilized Tree Resin)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary