Man Made Object (Coin)

Dark green cabochon gemstone ring

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

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Green Fluorite (Botryoidal/Massive)

Calcium Fluoride (CaF2)

Tumbled chalcedony pendant (likely agate)

Chalcedony, microcrystalline quartz (SiO₂); the pale bands suggest agate

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Painted Rock / Geode Specimen

Silicon Dioxide with artificial pigment coating

Chert (likely flint)

Microcrystalline quartz, SiO₂

Black onyx bead necklace

Black chalcedony, a microcrystalline quartz variety (SiO₂); beads may be dyed or treated

Calcite (likely honey/yellow calcite)

Calcite, CaCO₃; a carbonate mineral rather than a rock

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Polished agate or jasper cabochon

Microcrystalline quartz (chalcedony), SiO₂, possibly brecciated or plume agate

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Black tourmaline (likely schorl)

Schorl, NaFe3Al6(BO3)3Si6O18(OH)4

Tumbled amber jasper

Jasper, microcrystalline quartz (SiO₂), colored by iron oxides and dark mineral inclusions

Honey calcite (yellow calcite)

Calcite, calcium carbonate (CaCO₃)

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Blue Sapphire (Synthetic or Man-made Glass Imitation)

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

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Goldstone (aventurine glass)

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

Unidentified Small Rock

Unknown

Polished brown stone, likely smoky quartz or jasper

Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing

Orange Calcite

Calcium Carbonate (CaCO3)

Banded Marble (Egg Carving)

Metamorphosed Limestone (predominantly CaCO3)

Polished ocean jasper (orbicular jasper)

Silicified volcanic rock; chiefly microcrystalline quartz/chalcedony (SiO₂), with iron oxides and other alteration minerals

Tumbled blue chalcedony (likely blue lace agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly banded blue lace agate

Green Calcite

Calcite (CaCO3)

Tumbled orange chalcedony, likely carnelian

Carnelian (orange microcrystalline quartz), SiO₂

Tumbled dark reddish-brown stone, possibly red jasper

Jasper, microcrystalline quartz (SiO₂), likely iron-oxide colored

Calcite

Calcium Carbonate (CaCO3)

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral

Polished honey calcite (likely)

Calcite, calcium carbonate (CaCO₃)

Banded Calcite (Onyx Marble / Travertine)

Calcite (Calcium Carbonate, CaCO3)

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Small weathered mineral/rock fragment

Indeterminate; possibly quartz-bearing feldspathic rock or calcite-rich specimen

Pink Marble

Recrystallized Calcite Marble (CaCO3)

Hematite Beads

Hematite (Fe2O3)