Mixed

Epidosite with Quartz (Unakite-variant or Jasper)

Epidotized Metasomatite

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Diorite

Diorite (plutonic igneous rock)

Mixed tumbled rock and mineral collection

Varied specimens, including probable quartz varieties, jasper, agate, fluorite, rose quartz, amethyst, pyrite, calcite, and others

Concrete aggregate surface

Human-made cementitious composite; primarily calcium-silicate-hydrate cement with mixed silicate aggregate

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

Mixed rock and mineral collection

Assorted geological specimens; individual species cannot be reliably identified from the image

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

River-rounded landscaping pebbles

Mixed alluvial gravel; commonly quartzite, granite, basalt, sandstone, and quartz

Mookaite Jasper

Silicified radiolarite (SiO2)

Gravel and Pebbles

Unconsolidated rock fragments (clastic sediment)

Chrysocolla in Quartz

Hydrated copper phyllosilicate with silicon dioxide (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O + SiO2)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Amethyst (Raw Quartz)

Silicon Dioxide (SiO2)

Pink granite

Felsic intrusive igneous rock; chiefly quartz, alkali feldspar, plagioclase, and dark biotite/hornblende

Weathered granite (likely biotite granite)

Granite; primarily quartz (SiO₂), feldspar, and biotite mica

Tumbled beige stone, possibly quartz or calcite

Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Quartz-rich granitic fragment

Granite or granitic pegmatite; chiefly quartz (SiO₂), feldspar, and minor mica

Unakite

Granitic rock composed of pink orthoclase feldspar, green epidote, and clear quartz

Granite Pebble

Intrusive Igneous Rock (Granite)

Greenstone / Diorite

Intermediate plutonic igneous rock

Pink Granite

Intrusive Igneous Rock (high K-feldspar content)

Mixed tumbled gemstone chips

Polychrome jasper, quartz/chalcedony, feldspar, and other silicate fragments (exact identification requires testing)

Mixed tumbled gravel and quartz-rich sandstone

Primarily quartz (SiO₂), feldspar, and lithic sedimentary fragments; one piece appears to be quartz-rich sandstone

Landscaping Gravel / River Rock

Polymictic Gravel Aggregates

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly with feldspar and mica; exact identification is uncertain from the image

Amethyst crystal chips in a decorative container

Amethyst, purple quartz (SiO₂), with likely pale quartz or feldspar fragments

Polished hematite

Hematite (Fe₂O₃), likely a tumbled iron-oxide specimen

Pegmatite (Granitic Pegmatite with Quartz, Mica, and Tourmaline/Biotite)

Pegmatite

Chrysocolla in Matrix

Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Chrysocolla

(Cu,Al)2H2Si2O5(OH)4·nH2O

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2)

Granite or granitic gneiss boulders

Quartz–feldspar–mica granitoid; possibly banded gneiss

Amethyst tumbled stones

Quartz, SiO₂; purple coloration from irradiation and trace iron

Polymict conglomerate

Clastic conglomerate, likely polymictic pebble conglomerate

Conglomeratic sandstone or breccia specimen

Quartz-rich clastic sedimentary rock; likely sandstone with pebble-sized quartz, feldspar, and lithic clasts

Weathered iron-rich rock, possibly hematite-bearing chert

Hematite (Fe₂O₃), likely mixed with silica and iron oxides

Tumbled black tourmaline (likely schorl)

Schorl, sodium–iron tourmaline: NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Stream cobbles and gravel

Unidentified mixed fluvial clasts; likely quartzite, sandstone, and igneous/metamorphic fragments