Coquina
Bioclastic Limestone (Coquina)
sedimentary
Category
Mineral Based Human Made Alloy
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
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Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Sandstone (Arkose/Quartzose)
Arenite (SiO2 based clastic rock)
sedimentary
Tumbled Aventurine
SiO2 (Quartz with Fuchsite inclusions)
mineral
Tiger Carving (Banded Onyx or Calcite)
Banded Calcite (CaCO3)
sedimentary
Dyed Agate Slice
Chalcedony (Silicon Dioxide, SiO2) with artificial pigment
mineral
White Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcite, CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based with various cements)
sedimentary
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 based)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
sedimentary
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Conglomerate
Conglomerate
sedimentary
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Shale (with Iron Oxide staining)
Fissile Mudstone (primarily Quartz and Clay minerals)
sedimentary
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Moss Agate
Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide
mineral
Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Orbicular jasper (likely ocean jasper)
Silica-rich microcrystalline quartz/chalcedony with orbicular mineral inclusions; mainly SiO₂
mineral
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Flint Projectile Point)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Geode or Concretion
Silica-based Concretion / Quartz Geode
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Banded Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Diamond (Princess Cut Faceted Gemstone)
Native Carbon (C)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral