Sedimentary Rock (Metamorphosed)

Greenstone (likely serpentinite or chlorite-rich schist)

Serpentinite: Mg-rich phyllosilicates, chiefly antigorite/lizardite; possible chlorite-actinolite schist

Tumbled green aventurine (probable)

Quartzite dominated by quartz (SiO₂), with green mica/fuchsite or chlorite inclusions

Yellow Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Greenschist

Chlorite schist

Dark granite or granitic gneiss slab

Quartz–feldspar–biotite granite; possibly foliated granitic gneiss

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Banded limestone or marble

Calcite-rich carbonate rock; likely veined limestone, possibly low-grade marble (CaCO₃)

Quartzite River Stone

Quartzite (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

River Stone (Green Quartzite)

Quartzite (Metamorphosed Sandstone)

Foliated metamorphic rock, likely marble or calc-schist

Calcite-rich marble/calc-schist; predominantly CaCO₃ (calcite), with possible mica and quartz

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Blue Quartzite

Metamorphosed Quartz (SiO2) with inclusions

Quartzite with Quartz Veining

Metamorphosed Sandstone (SiO2 with impurities)

Gray Quartzite with Quartz Veining

Metamorphosed Quartz-rich Sandstone

Quartzite (Banded)

Metamorphosed Sandstone (SiO2 with impurities)

River Pebble (likely Quartzite or Diorite)

Metamorphosed Quartz-rich Rock / Intermediate Igneous Rock

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Anthracite Coal

Anthracite (Metamorphosed Carbon)

Anthracite Coal

Anthracite (Metamorphosed Carbon)

Quartzite Pebble

Metamorphosed Quartz-rich Sandstone

Quartzite River Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Orange chromium diopside (likely tumbled)

Diopside, CaMgSi₂O₆; orange color may reflect iron-rich composition or surface treatment/inclusion

Quartzite

Quartzite (mostly SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (silicon dioxide, SiO₂); if granular and foliated, likely quartzite

Likely weathered granite or granitic gneiss fragment

Granite–gneiss, chiefly quartz, feldspar, and mica

Weathered granite or granitic gneiss

Granite; chiefly quartz, feldspar, and mica (possibly gneissic if foliation is confirmed)

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite (with Iron Staining)

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Granite or granitic gneiss

Quartz–feldspar–mica aggregate; possibly orthogneiss if the faint banding is structural

Tumbled blue stone, likely blue aventurine or dyed quartzite

Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing

Quartz-rich feldspathic rock, likely granite or granitic gneiss

Granite/granitic gneiss; chiefly quartz (SiO₂), feldspar, and minor mica

Slate

Slate (Metamorphosed Mudstone/Shale)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)