Man Made Rock (Technosol)

Vesicular Basalt (or Scoria)

Mafic extrusive igneous rock with vesicles

Nephrite Jade

Nephrite

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, Mica)

Sandstone Pebble with Mineral Encrustation

Quartz Sandstone with Calcite/Halite Crust

Granite

Intrusive Igneous Rock

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Fossilized Stingray Mouth Plate

Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)

Pyrite

Iron Disulfide (FeS2)

Lapis Lazuli

A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various metal oxide impurities

Likely basalt or vesicular volcanic rock

Basalt, possibly scoriaceous basalt; exact identification is uncertain from the photograph

Granite Pebble with Quartz Vein

Granite (Plutonic Igneous Rock) with Quartz (SiO2)

K-Feldspar Granite Fragment

Felsic Plutonic Rock (Granite)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Red Sandstone

Clastic Sandstone (typically Quartz-rich with Iron Oxide)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Shale

Laminated Mudstone (Shale)

Vesicular Basalt (or Scoraceous Basalt)

Basalt (Vesicular texture)

Quartz River Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt with Quartz Vein

Mafic volcanic rock with hydrothermal SiO2 filling

Limestone

Calcium Carbonate (CaCO3)

Shale

Shale (Lutite)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Basalt Cobble

Vesicular Basalt (Mafic Extrusive)

Granodiorite

Granodiorite

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.

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Vesicular Basalt (Pumice-like)

Vesicular Basalt

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Wishing Stone (Quartz Vein in Greywacke / Basalt)

Quartz vein in host rock (e.g. Meta-basalt or Greywacke)

Quartz Vein in Metamorphic Rock

Quartz-veined Schist or Gneiss

Crushed Granite and Basalt

Phaneritic Igneous Rock / Aphanitic Igneous Rock

Shale

Argillite / Shale

Desert Rose

Gypsum (CaSO4·2H2O) or Barite (BaSO4)

Quartz Geode

Silicon Dioxide (SiO2) within a sedimentary or volcanic shell

Granodiorite (Weathered)

Granodiorite

Quartz Vein in Metamorphic Rock

Quartzite or Schist host with Quartz (SiO2) intrusion

Puddingstone (Quartzite Pebble)

Metaconglomerate / Jasper-Quartzite Pebble