Man Made Material (Anthro Lithic Product)

Vesicular volcanic rock, likely pumice or scoriaceous rhyolite

Silica-rich vesicular volcanic rock; commonly rhyolitic pumice (SiO₂-rich glass)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Rough White Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Conglomeratic sandstone or breccia

Lithic arkose / polymictic conglomeratic sandstone

Asphalt (Aggregate)

Bituminous macadam / Concrete Aggregate

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

Vesicular scoria (likely iron-rich volcanic scoria)

Scoria, typically basaltic to andesitic; chiefly plagioclase, pyroxene, olivine, and volcanic glass

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Slate

Metamorphic rock (fine-grained, foliated)

Chert (often called Flint in this context)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Rounded sandstone pebble

Quartz-rich sandstone (likely arkosic or ferruginous sandstone)

Red Sandstone

Sandstone (lithic arenite / ferruginous sandstone)

Raw botryoidal goethite/limonite specimen

Goethite (α-FeO(OH)), commonly mixed with limonite (hydrated iron oxides)

Sandstone (Calcareous/Lithic)

Sedimentary Rock (Clastic Sandstone with Calcium Carbonate cement)

Chert (Arrowhead/Tool variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Gold (Elemental Metal)

Gold (Au)

Brown beach pebble with iron-rich inclusion

Likely fine-grained sandstone or siltstone; inclusion possibly weathered ironstone/volcanic rock

Pumice

Pumice, a highly vesicular volcanic glass, commonly rhyolitic to dacitic in composition

Vesicular scoria (oxidized basaltic scoria)

Scoria; vesicular mafic volcanic rock, typically composed mainly of plagioclase, pyroxene, and iron-rich glass/oxides

Pumice

Pumice (Volcanic Rock / Glass Froth)

Rounded sandstone pebble

Lithified quartz-rich sandstone, likely arkosic or feldspathic sandstone

Coquina or Fossiliferous Sandstone

Fossiliferous Calcarenite (CaCO3 with SiO2 inclusions)

Iron-rich weathered pebble (likely limonite/goethite-bearing rock)

Limonite mixture, commonly dominated by goethite (FeO(OH)) and hematite (Fe₂O₃)

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Sandstone

Sedimentary Rock (Quartz arenite / Lithic sandstone)

Sandstone

Sedimentary Rock (Quartz arenite / Lithic sandstone)

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Blue Goldstone

Aventurine Glass (SiO2 with Cobalt/Copper inclusions)

Amethyst chips

Quartz, purple variety (SiO₂)

Slate

Metamorphic Pelitic Rock

Tumbled dark stone, likely basalt or basaltic rock

Fine-grained mafic volcanic rock; commonly basalt, composed chiefly of plagioclase and pyroxene with possible olivine and iron oxides

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Diamond

Native Carbon (C)

Sandstone (Graywacke type)

Clastic Sedimentary Rock (Lithic Sandstone)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)

Chert (varietal: Flint/Jasper)

Silicon Dioxide (SiO2)

Tumbled carnelian

Chalcedony (microcrystalline quartz), SiO₂

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Red Sandstone

Sandstone (lithic arenite or arkose with iron oxide)