Sedimentary (Processed Mineral Product)

Polished red jasper beads

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

Red goldstone beads

Goldstone (man-made copper-bearing glass; not a natural mineral)

Black Opal (Kalimaya)

Hydrated Silica (SiO2·nH2O)

Honey calcite (rough cleavage fragment)

Calcite, CaCO₃

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Decorative polished pebbles

Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Jasper with Iron Staining

Silicon Dioxide (SiO2) with impurities

Yellow Calcite

Calcium Carbonate (CaCO3)

Slag (Industrial By-product)

Glassy silicate or metallic smelting residue

Hematite

Hematite (Fe2O3)

Hematite

Hematite (Fe2O3)

Native Sulfur

Sulfur (S)

Iron-rich concretion or slag-like rock

Goethite–hematite limonite concretion, possibly iron slag

Hematite (Iron Ore)

Hematite (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Epidote

Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))

Hematite

Iron(III) oxide (Fe2O3)

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Travertine

Calcium Carbonate (CaCO3)

Iron-oxide-stained sulfide-bearing rock, possibly pyrite-bearing schist

Likely quartz–mica schist or massive sulfide rock with pyrite (FeS₂) and limonite/goethite (FeO(OH)·nH₂O)

Blue Sapphire and Diamond (Set in Metal)

Corundum (Al2O3) and Diamond (C)

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone

Quartzose Sandstone

Weathered Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Zinc Alloy (Silver-plated)

Zinc Alloy Casting (Zn-Al-Mg-Cu)

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (SiO2 based)

Hematite

Iron(III) oxide (Fe2O3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Likely blue calcite

Calcite (CaCO₃)

Pink Granite

Phaneritic Plutonic Felsic Igneous Rock (Granite)

Likely yellow calcite

Calcite (CaCO₃)

Likely tumbled pale-green mineral specimen

Indeterminate; possibly serpentine, calcite, or pale jade/nephrite

Banded Agate Coaster

Silicon Dioxide (SiO2) - Variety Agate / Chalcedony

Orange calcite

Calcite, CaCO₃

Hematite

Iron(III) oxide (Fe2O3)