Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Granite

Granite

Granite

Phaneritic Felsic Igneous Rock

Serpentinite

Serpentinite (composed primarily of serpentine group minerals including antigorite, chrysotile, and lizardite)

Lapis Lazuli

Lapis Lazuli (Complex rock mainly composed of Lazurite, Calcite, and Pyrite)

Granitic Gneiss

Gneiss (Metamorphic Rock)

Gravel and Sediment Sample

Mixed clastic sediment

Granite

Intrusive igneous rock

Pink Granite

Phaneritic Felsic Igneous Rock

Phyllite (possibly low-grade greenish slate)

Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)

Sandstone

Clastic Sedimentary Rock

Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)

Granite

Phaneritic intrusive igneous rock (approx. 70 percent SiO2)

Wishing Stone with Quartz Veins

Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)

Schist

Metamorphic Schist

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Granite (Pebble)

Intrusive Felsic Igneous Rock

Moonstone

Orthoclase (KAlSi3O8) or Oligoclase with adularescence

Ferruginous Sandstone

Sandstone (rich in iron oxides/hydroxides)

Granite

Intrusive Igneous Rock

Granite Pebble

Granite

Fossil Coral

Hexagonaria or Rugose Coral (Fossilized Calcium Carbonate / Silica)

Quartzite

Metamorphic Quartz-rich Rock

Red Sandstone

Sedimentary Arenite / Quartzose Sandstone

Diorite

Diorite (intermediate intrusive igneous rock)

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

Dalmatian Stone

Peralkaline Feldsphathic Igneous Rock

Porphyry (specifically Porphyritic Rhyolite or Andesite)

Porphyritic Igneous Rock (composed of Phenocrysts in an Aphanitic groundmass)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Granite

Felsic Intrusive Igneous Rock

Dalmatian Stone

Aplite (often incorrectly called Dalmatian Jasper)

Sandstone

Arenite (SiO2 based)

Turquoise in Matrix

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

Blue Lace Agate (Tumbled)

Silicon Dioxide (SiO2) with trace minerals

Granite

Intrusive Felsic Igneous Rock

Siltstone Pebble

Siltstone (composed of microscopic quartz and clay minerals)

Milky Quartz

Silicon Dioxide (SiO2)

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist, possibly with quartz and feldspar

Gabbro

Phaneritic Basic Igneous Rock