Chert (with Calcite Veining)
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) veins
sedimentary
Category
Mineral Based Human Made Alloy
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Blue Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial pigment
mineral
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/bd94961c-533a-4ed4-b8e1-773f9b478c18-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Opalite (a synthetic glass)
Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant
Mineral Simulant (Synthetic Glass)
Sandstone
Arenite (SiO2 based with quartz, feldspar, or lithic fragments)
sedimentary
Chert (Nodular)
Microcrystalline Silica (SiO2)
sedimentary
Dyed Blue Agate
Silicon Dioxide (SiO2) with artificial cobalt-based dye
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Raw Diamond
Carbon (C)
gemstone
Chert with Quartz Druzy
Microcrystalline Quartz (SiO2) with Drusy Quartz Coating
sedimentary
Pink Dyed Agate (Banded Chalcedony)
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Gold Nugget
Gold (Au)
mineral
Diamond
Carbon (C)
mineral
Granodiorite / Granite (Weathered)
Granodiorite
Igneous
Chert (Flint) Artifact
Silicon Dioxide (SiO2)
sedimentary
Tumbled milky quartz
Quartz (SiO₂), microcrystalline or massive variety
mineral
Blue-dyed howlite beads (likely)
Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise
mineral
Gold Ore / Native Gold
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Gold
Gold (Au)
mineral
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Metallic sulfide ore, likely galena-bearing rock
Galena (lead sulfide, PbS), possibly with pyrite or other sulfides
mineral
Raw galena specimen
Galena (lead sulfide, PbS)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Chert (specifically White Chert or Novaculite)
Silicon Dioxide (SiO₂)
sedimentary
Banded Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Carved quartz skull
Quartz (silicon dioxide, SiO₂)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)
mineral
Kidney Stone (Urolith)
Calculus renalis (Biogenic mineral aggregate)
mineral
Concrete Fragment
Hardened Portland cement and mineral aggregate
sedimentary (anthropogenic)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Tumbled brown chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Tumbled orange chalcedony (likely carnelian)
Microcrystalline quartz, SiO₂; iron-bearing variety commonly termed carnelian
mineral
Tumbled honey calcite (likely)
Calcite, calcium carbonate (CaCO₃)
mineral
Quartz heart (likely milky/included quartz)
Quartz, silicon dioxide (SiO₂)
mineral