Not A Rock Or Mineral

Schist

Chlorite/Mica Schist

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Mica Schist

Crystalline Schist (often containing Muscovite, Biotite, and Quartz)

Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)

Diorite (Igneous rock, intrusive, intermediate composition)

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Ruby in Zoisite (Anyolite)

Anyolite (Combination of Corundum and Zoisite)

Red Sandstone

Sandstone (mainly SiO2 with Iron Oxide cement)

Sandstone

Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Sandstone

Arenite (SiO2 based)

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Chalcedony

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Specular Hematite

Iron Oxide (Fe2O3)

Agate (specifically Botswana or Lake Superior style chalcedony)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian)

Cryptocrystalline Silicon Dioxide (SiO2)

Placer Gold Nugget

Native Gold (Au)

Blue Lace Agate (Heat-treated/Crackle Quartz variety)

Silicon Dioxide (SiO2)

Blue Chalcedony

Chalcedony (SiO2)

Basalt with Epidote/Chlorite

Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))

Sandstone

Arenite (composed primarily of SiO2)

Turquoise

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

Granite

Granite (Felsic Plutonic Rock)

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Yooperlite (Syenite clast containing fluorescent Sodalite)

Sodalite-bearing Syenite

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Turquoise

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

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Aquamarine

Beryl (Be3Al2Si6O18 with trace Fe2+)

Tree Agate

Silicon Dioxide (SiO2) with Dendritic Inclusions

Sandstone (with carbonaceous plant fragments)

Arenite (composed primarily of SiO2)