Mineral, Part Of A Rock

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Schist

Mica Schist

Bauxite

Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)

Milky Quartz

Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Vesicular-Amygdaloidal Basalt (Mafic Extrusive)

Smoky Quartz

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3) with Chromium traces

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (with iron oxide cement, Fe2O3)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Turquoise

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

Gneiss (with Quartzite and Mica)

Gneiss

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Red Sandstone

Arenite (Fe2O3 rich)

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Sedimentary rock with quartz veining

Laminated siltstone or mudstone with hydrothermal quartz veins

Sandstone (likely Arkose)

Arenite (composed mainly of SiO2 with Feldspar)

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

Quartz (Variety of Rough Mineral Specimens)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Grey Agate (Tumbled)

Silicon Dioxide (SiO2)

Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)

Tree Agate

Dendritic Chalcedony (SiO2)

Sandstone (Stream-rounded)

Arenite (SiO2 based)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Conglomerate

Clastic sedimentary rock (Puddingstone)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Quartz with Hematite Staining

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) inclusions

Diorite

Phaneritic Intermediate Plutonic Rock (Diorite)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)

Sandstone

Arenite (SiO2 + various cementing minerals)

Black Sand (Magnetite Sand)

Magnetite-rich Placers (Fe3O4)

Dalmatian Stone

Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)

Gneiss

High-grade metamorphic rock (Gneiss)