Metamorphic Rock (Composed Of Multiple Minerals)

White Marble

Recrystallized Calcite (CaCO3)

Ironstone Concretion / Goethite Nodules

Ironstone (composed primarily of Goethite FeO(OH) and Limonite)

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)

Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)

Granite

Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Gneiss (Metamorphic Rock)

Gneiss

Sandstone

Arenite (Clastic Sedimentary Rock)

Sandstone

Arenite (SiO2 based)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Chalcedony (River Stone)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Moonstone

Orthoclase Feldspar (composed of alternate layers of orthoclase and albite), (K,Na)AlSi3O8

Greenschist (Greenstone)

Chlorite Schist / Greenschist Facies Rock

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Sandstone

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

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Gneiss (Metamorphic Rock)

Gneiss (high-grade regional metamorphic rock)

Quartzite River Rock

Quartzite (primarily SiO2)

Sandstone

Arenite (Clastic Sedimentary Rock)

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Sandstone

Arenite (primarily SiO2)

Basalt

Mafic volcanic rock, primarily composed of Plagioclase, Pyroxene, and Olivine

Greenstone

Greenschist (metamorphosed mafic igneous rock)

Specular Hematite (Specularite) in Matrix

Specularite (Fe2O3)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Granite

Phaneritic Acidic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Biotite Schist

Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)

Moonstone

Orthoclase Feldspar (KAlSi3O8)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide)

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

Schist

Mica Schist

Basalt

Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)

Milky Quartz

Silicon Dioxide (SiO2)

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions