Man Made Byproduct (Non Geological)

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Unidentified gray stone/concrete-like fragment

Indeterminate; likely a fine-grained carbonate or cementitious geological fragment

Tektite

Natural impact glass

Obsidian

Volcanic Glass (Amorphous SiO2)

Mounted faceted gemstone ring

Likely diamond (carbon, C), though the image is insufficient for definitive identification

Unidentified gray rock fragment

Indeterminate from image; possibly quartz- or feldspar-rich silicate material

Sea Glass (Teal/Turquoise)

Amorphous Silica (SiO2) with trace metal oxides

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

Weathered metallic sulfide ore, likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz–iron-oxide host

Pyrite (on Quartz matrix)

Iron Disulfide (FeS2)

Quartzite

Metamorphic Quartzite (SiO2)

Slag (Industrial Glassy Byproduct)

Ferro-silicate Slag

Sea glass (likely pale blue glass)

Human-made silicate glass, likely soda-lime glass; not a natural mineral or rock

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Diamond

Carbon (C)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Fossilized coral (possible)

Indeterminate fossil; the image does not show enough diagnostic detail to identify a taxon

Tumbled milky quartz pebble

Quartz (SiO₂), likely milky quartz

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various additives

Polished, carved gemstone (possibly dyed agate or glass-like material)

Unconfirmed from the image; no specific mineral can be identified reliably

Faceted transparent gemstone pendant

Uncertain from image; likely faceted quartz (SiO₂), cubic zirconia (ZrO₂), or glass imitation

Quartzite

Metamorphic Quartzite (SiO2)

Possible ironstone concretion or weathered mineral nodule

Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo

Chalcedony (likely agate)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Carved amethyst fluorite (likely)

Amethyst, purple variety of quartz (SiO₂), possibly with fluorite (CaF₂)

Flint (chert)

Microcrystalline quartz (SiO₂), a variety of chert

Dark green cabochon gemstone ring

Unknown; possibly green onyx (cryptocrystalline quartz, SiO₂) or another green gem

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate)

Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass

Unidentified metallic mineral or metal-like specimen

Indeterminate from image; possibly galena (PbS) or a metallic sulfide

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Diamond

Carbon (C)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Flint (chert)

Microcrystalline quartz (SiO₂), commonly called chert or flint

Tektite

Impactite (Natural Silicate Glass)

Brecciated Jasper

Brecciated Jasper (Microcrystalline Quartz / SiO2)

Chert (likely flint)

Microcrystalline quartz, SiO₂

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Diamond

Carbon (C)

Sea Glass (Turquoise/Aqua)

Amorphous Silica (SiO2) with transition metal dopants