Igneous And Sedimentary

Biotite on Matrix

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Knightia Fossil in Limestone

Knightia eocaena in micritic limestone

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Indigo Gabbro (also known as Mystic Merlinite)

Gabbro (composed of Plagioclase Feldspar, Pyroxene, and minor Magnetite/Ilmenite)

Garnet Rhyolite

Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet

Granite

Granite (Mainly Quartz, Feldspar, and Mica)

Chert (Agatized/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Snowflake Obsidian

Volcanic glass containing Spherulitic Cristobalite (SiO2)

Granite

Granitoid

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

Granite

Intrusive Igneous Rock (composed primarily of Quartz: SiO2, Feldspar: KAlSi3O8, and Mica: KAl2(AlSi3O10)(OH)2)

Granite

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Granite

Granite (Phaneritic intrusive igneous rock)

Granite

Granite

Mica-rich Pegmatite

Pegmatite (rich in Muscovite and Biotite)

Sodalite

Sodalite: Na8(Al6Si6O24)Cl2

Granite

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

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (with trace inclusions)

Silicon Dioxide (SiO2)

Milky Quartz with Chlorite/Moss Infusions

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Red Arkose)

Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)

Granite

Granite (a common term for a felsic intrusive igneous rock)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Chert (Beach Pebble)

Microcrystalline Quartz (SiO2)

Caribbean Calcite

Calcium Carbonate with Argonite (CaCO3)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Sodalite

Na8(Al6Si6O24)Cl2

Granite Pebble

Felsic intrusive igneous rock

Dolerite (Diabase)

Dolerite / Diabase