Industrial Byproduct (Anthropogenic Rock)

Basalt with Alteration Crust

Basalt (SiO2 range 45-52%)

Leopard Skin Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Basalt

Basalt (Mafic volcanic rock)

Basalt River Cobble

Basalt (Mafic volcanic rock)

Basalt Cobble

Aphanitic Mafic Igneous Rock (Basalt)

Milky Quartz with Chlorite Schist Inclusions

Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, Mica)

Tektite (likely indochinite)

Natural silica-rich impact glass; predominantly amorphous SiO₂ with aluminum, iron, magnesium, calcium, and sodium

Crushed Stone / Gravel

Aggregatus saxum (variable mineral composition)

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Unknown Tumbled Stone

Unknown (Too Blurry)

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Quartzite Cobble

Metamorphosed sandstone (SiO2)

Sandstone

Arenite

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Chakra Tumbled Stone Set

Various (including Amethyst [SiO2], Sodalite [Na8(Al6Si6O24)Cl2], Green Aventurine [SiO2], Red Jasper [SiO2], etc.)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz Geode

Silicon Dioxide (SiO2)

Vesicular Basalt (Lava Rock)

Vesicular Basalt

Unidentified Rock

Unknown

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Fossilized Bark

Lepidodendron / Sigillaria fossil impression

River Pebble (likely Quartzite or Siltstone)

Sedimentary Clast (SiO2 based)

Orange Quartz (or Carnelian Chalcedony)

Silicon Dioxide (SiO2)

Quartz with Host Rock

Silicon Dioxide (SiO2)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Granite Cobble

Intrusive Igneous Rock (Felsic to Intermediate)

Basalt

Extrusive Igneous Rock

Basalt

Extrusive Igneous Rock

Granite

Intrusive Igneous Rock

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Banded Greywacke

Greywacke (Lithic wacke)

Dyed Quartzite

Metamorphosed Quartz (SiO2) with synthetic pigment

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Basalt

Extrusive mafic igneous rock

Slate

Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)

Black Sapphire

Corundum (Al2O3 with iron and titanium impurities)

Rough Diamond

Pure Carbon (C)

Painted River Rock

Painted Quartzite or Smooth Siltstone

Diamond

Carbon (C)

Rough Diamond

Diamond (pure Carbon, C)