Mineral_rock

Sandstone (Quartz-rich)

Arenite

Sandstone (with Iron Staining)

Arenite (Silicon Dioxide, SiO2, often with iron oxides like Limonite)

Red Sandstone

Arenite (Ferruginous Sandstone)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Gneiss

Gneiss

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Graphite

Graphite (Carbon, C)

Copper Ore (Malachite and Azurite stained rock)

Copper-bearing rock with secondary copper carbonates

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH)

Basalt with Quartz Vein

Extrusive Igneous Rock / Volcanic Rock

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive volcanic rock)

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Quartz in Matrix (Lepidolite or Quartzite)

Silicon Dioxide (SiO2) with host rock

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Quartz (Pink/Orange Variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Limonite (Ironstone)

Limonite (FeO(OH)·nH2O)

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Pegmatite (with Muscovite Mica and Quartz)

Granitic Pegmatite (chiefly KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Limonite (often after Hematite or Goethite)

Limonite (FeO(OH)·nH2O)

Banded sandstone pebble

Quartz-rich lithic sandstone; exact provenance and composition require testing

Basalt (Greenstone/Water-worn Pebble)

Basalt (containing Chlorite/Epidote)

Granite

Intrusive Igneous Rock

Granite

Intrusive Igneous Rock

Septarian Nodule

Septarian Concretion (CaCO3 with Calcite/Aragonite and Clay/Mudstone)

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone (Ferruginous)

Arenite with iron oxide cement (Fe2O3)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Black Marble

Recrystallized Calcite (CaCO3)

Red Sandstone

Arenite with iron oxide (Hematite) cement

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and organic impurities

Sandstone with Iron Oxide Staining

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Red Sandstone Pebble

Arenite with Hematite (Fe2O3) cement

Gneiss

Gneiss

Granitic Gneiss

Gneiss (Metamorphic rock predominantly containing quartz, K-feldspar, and plagioclase)

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile [Mg₃Si₂O₅(OH)₄]