Not A Rock Or Mineral

Granite

Granite

Copper Ore with Chrysocolla and Azurite

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)

Snowflake Obsidian

Volcanic glass containing Spherulitic Cristobalite (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Mica Schist

Schist (Biotite/Muscovite rich)

Fossiliferous Shale (with Vertebrate Bones)

Laminated Mudstone containing Fossilized Bone (Apatite)

Banded Agate Geode

Silicon Dioxide (SiO2)

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Glaucophane Schist (Blueschist)

Blueschist (Glaucophane-bearing schist)

Dalmatian Jasper

Peralkaline rhyolite with Arfvedsonite inclusions

Marble

Recrystallized Carbonate Rock (CaCO3)

Marble

Recrystallized Calcite Rock (CaCO3)

Sandstone

Arenite (SiO2 primarily)

Sandstone

Arenite (composed primarily of SiO2)

Sedimentary Breccia

Clastic Breccia (CaCO3/SiO2 matrix)

Sandstone (Weathered Pebble)

Arenite (SiO2 primarily)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Limonitic Sandstone with Inclusion

Limonitic Quartz Sandstone (primarily SiO2 with FeO(OH)·nH2O)

Jasper

Silicon dioxide (SiO2)

Ocean Jasper

Silicon dioxide with impurities (SiO2 + impurities)

Sandstone Pebble

Arenite (primarily Quartz, SiO2)

Sandstone

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Red)

Arenite (SiO2 with Fe2O3)

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Dalmatian Stone

Dalmatian Stone (a peralkaline igneous rock consisting of Feldspar, Quartz, and Arfvedsonite)

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide staining)

Ferruginous Sandstone

Sandstone (rich in iron oxides/hydroxides)

Sandstone

Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)

Rose Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Andesite

Intermediate Volcanic Rock (Andesite)

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Pyrite in Matrix (Quartz/Schist)

Iron Sulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz Sphere

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO₂)

Clear Quartz

Silicon Dioxide (SiO2)