Non Geological

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Red Quartzite / Ferruginous Sandstone

Quartzite (SiO2 with iron oxide impurities)

Basalt

Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Sandstone (likely Quartzose type)

Clastic sedimentary rock (primarily SiO2)

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Slate with Red Sandstone Landscaping Rock

Foliated Pelitic Metamorphic Rock (Slate) and Ferruginous Sandstone

Red Sandstone

Arenite (Fe2O3 rich)

River Stone (Chert/Siltstone)

Cryptocrystalline Quartz (SiO2) with trace impurities

Sandstone

Arenite (primarily SiO2 with trace Fe2O3)

Sandstone (Ferruginous)

Arenite (Fe2O3 stained)

Red Sandstone

Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)

Ironstone Concretion (Moqui Marble type)

Iron oxide concretion (Goethite/Hematite and Sandstone)

Pegmatite

Pegmatitic Granite

Jasper-Agate Breccia

Silicon Dioxide (SiO2) with iron oxide inclusions

Fossilized Bone Fragment

Permineralized Skeletal Element (Likely Vertebrate)

Azurite in Gossan

Azurite (Cu3(CO3)2(OH)2) in Limonite/Goethite matrix

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Greenstone (Epidisite / Chlorite Schist)

Metabasalt (often contains Epidote Ca2Al2(Fe3+,Al)(SiO4)(Si2O7)O(OH) and Chlorite)

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Snowflake Obsidian

Volcanic glass containing Spherulites (SiO2)

Pumice

Felsic Volcanic Glass / Vesicular Rhyolite

Polychrome Jasper

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Quartz with Mica inclusions (likely Schist or Gneiss host)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Ferruginous Sandstone (Ironstone Nodules)

Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)

Graywacke (River Cobble)

Graywacke (Lithic Sandstone)

Greenstone with Quartz Veining

Epidiorite or Metabasalt with SiO2 (Quartz) veins

Granite Cobble

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Greyling Sandstone / Greywacke

Lithic Wacke (SiO2 + diverse mineral fragments)

Quartz-veined Sedimentary Rock

Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)

Sandstone (with banding/weathering)

Clastic Sedimentary Rock (primarily SiO2)

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Aquamarine

Beryl (Be3Al2Si6O18)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Quartz Crystal

Quartz (SiO₂)

Pyrite

Pyrite (FeS2)

Greenschist / Chloritaform Schist

Chlorite Schist (Group of Silicate Minerals)