Anthropogenic Material (Man Made Rock)

Chert (Flint)

Silicon dioxide (SiO2)

Chert (Flint)

Microcrystalline quartz (SiO2)

Cobalt Blue Slag Glass

Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives

Limestone

Calcareous sedimentary rock (CaCO3)

Faience and Carnelian in Egyptian Revival Jewelry

Faience (quartz frit) and Carnelian (chalcedony, SiO2)

Chert (Flint)

Chert (Cryptocrystalline Silica, SiO2)

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Slate

Metamorphic pelitic rock

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Slag

Anthropogenic Vitreous Silicate / Ferro-silicate Slag

Unknown dark mineral/rock fragment

Indeterminate; possibly a dark sulfide mineral or slag-like geological fragment

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Chert (possibly a worked stone flake)

Microcrystalline quartz, SiO₂

Sandstone

Arenite

Banded Sandstone

Arenite with Liesegang banding

Carnelian cabochon pendant

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Red jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Chert (Arrowhead/Projectile Point)

Cryptocrystalline Quartz (SiO2)

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Diamond

Carbon (C)

Diamond

Carbon (C)

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Tumbled brown chalcedony or agate

Microcrystalline quartz (SiO₂), likely chalcedony; possibly iron-stained jasper or agate

Flint (chert)

Microcrystalline quartz (SiO₂), commonly called chert or flint

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Iron-stained quartz-rich rock, possibly jasper or chert

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides

Unakite

Altered Granite (Epidotized Granite)

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Tektite

Impactite (Natural Silicate Glass)

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Basalt

Basalt

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various additives

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Hematite Beads

Hematite (Fe2O3)