Mineral Description (Anthropogenic Material)

Likely iron-rich slag or weathered ironstone

Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag

Polished malachite slab

Malachite, Cu₂CO₃(OH)₂; likely polished and possibly resin-stabilized

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (CaCO3/SiO2 cemented quartz)

Sandstone (Ferruginous)

Arenite with Iron Oxide staining (Fe2O3)

Sandstone

Arenite (primarily composed of SiO2 - Silicon Dioxide)

Fossiliferous Limestone containing a Brachiopod or Mollusk Impression

Biogenic Sedimentary Rock / Fossiliferous Limestone

Honey calcite (calcite-rich limestone/marble fragment)

Calcite — CaCO₃; likely coarse crystalline calcitic rock

Diorite

Intermediate Phaneritic Igneous Rock

Fossil shark tooth

Likely Otodus megalodon (species identification uncertain from image)

Green-and-white quartz-rich rock, likely chrysoprase or serpentine-bearing stone

Uncertain; possible chrysoprase (microcrystalline quartz, SiO₂) or serpentinite (magnesium silicate minerals)

Petrified Wood

Silicified Wood (SiO2)

Ferruginous Sandstone

Ferruginous Quartz-Arenite

Sandstone

Arenite (mostly Quartz-based)

Tumbled chalcedony or quartz-rich stone

Microcrystalline quartz, SiO₂; possibly pale chert or chalcedony

Honey calcite (likely rough cleavage fragment)

Calcite, calcium carbonate (CaCO₃)

Likely galena-bearing ore specimen

Galena (PbS), possibly with quartz or calcite gangue

Red jasper-bearing breccia (probable)

Microcrystalline quartz (SiO₂) with iron-oxide coloration, in a brecciated host

Likely tumbled quartz-rich pebble

Quartz (SiO₂), possibly a weathered quartzite or chalcedony pebble

Jasper or Agate (Chalcedony)

Silicon Dioxide (SiO2) with impurities

Honey calcite (orange calcite)

Calcite, calcium carbonate (CaCO₃)

Polished red jasper beads

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

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Larimar

Pectolite [NaCa2Si3O8(OH)] with copper substitution

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide with inclusions (SiO2)

Blue Quartz (Dumortierite Quartz)

Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)

Pink Granite

Phaneritic plutonic rock (dominated by Alkali Feldspar)

Tumbled jasper or brecciated jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and dark mineral inclusions

Red jasper (likely brecciated jasper)

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

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Brecciated jasper, possibly rainforest jasper

Jasper: microcrystalline to cryptocrystalline quartz, SiO₂, commonly containing hematite, goethite, chlorite, epidote, and other iron- and manganese-bearing minerals

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (Siliclastic sedimentary rock)

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

Sandstone Pebble

Arenite (SiO2 primarily)

Sandstone (likely Graywacke or Arkose)

Clastic Sedimentary Rock (primarily SiO2 with various lithic fragments)

Sandstone

Arenite (composed primarily of SiO2)