Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Category
Anthropogenic (Man Made)
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Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Sandstone
Arenite
sedimentary
Tumbled blue-green stone, likely chrysocolla or dyed chalcedony
Probable chrysocolla (hydrated copper aluminosilicate; variable composition), though appearance could also represent dyed chalcedony
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Quartzite
Metamorphic Quartzite
metamorphic
Diamond
Diamond (pure Carbon, C)
mineral
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Basalt
Basalt
igneous
Tumbled green aventurine (probable)
Quartzite dominated by quartz (SiO₂), with green mica/fuchsite or chlorite inclusions
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Diamond
Carbon (C)
mineral
Diamond
C (Pure Carbon)
gemstone
Quartzite
Quartzite (Metamorphosed Sandstone)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Basalt
Basalt (containing plagioclase, pyroxene, and olivine)
igneous
Unidentified gray stone/concrete-like fragment
Indeterminate; likely a fine-grained carbonate or cementitious geological fragment
sedimentary
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Likely tumbled epidote-bearing rock or green jasper
Epidote-group silicate, possibly in a jasper or serpentinite matrix
mineral
Chert (Siltstone / Flint)
SiO2 (Cryptocrystalline Quartz)
sedimentary
Tumbled chalcedony or quartz pebble
Microcrystalline quartz, SiO₂ (likely chalcedony); exact identification is uncertain from the image
mineral
Turquoise-style beaded bracelet
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads
mineral
Botryoidal chalcedony with iron-oxide staining
Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chalcedony
mineral
Limestone
Sedimentary Rock (Primarily CaCO3)
sedimentary
Sandstone (Pebble)
Sandstone (SiO2 with matrix/cement)
sedimentary
Red Quartzite
Quartzite (Metamorphic quartz sandstone)
metamorphic
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Diamond
Carbon (C)
mineral
Weathered chert or chalcedony nodule
Microcrystalline quartz (SiO₂), possibly silicified limestone or agate-like chalcedony
sedimentary
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
sedimentary