Igneous And Mineral

Basalt with Epidote Veining

Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)

Basalt with Garnet inclusions

Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)

Chondrite Meteorite Fragment

Ordinary Chondrite (L or H type)

Granite

Granite (primarily Quartz, Feldspar, and Mica)

Granite

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

Quartz with Mica (Gneissic or Pegmatitic origin)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(F,OH)2)

Greenschist

Greenschist (Chlorite Schist)

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Granite (specifically the Ubatuba variety)

Phaneritic Igneous Rock (Granodiorite/Monzogranite)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst

Silicon Dioxide (SiO2 with iron impurities)

Smoky Quartz

Silicon Dioxide (SiO2)

Scoria (Lava Rock)

Scoria (Vesicular Basaltic Rock)

Granite

Granite (Felsic Plutonic Rock)

Scoria (Basaltic Lava Rock)

Vesicular Basalt

Granite

Granite (Phaneritic Igneous Rock; primarily Quartz, Alkali Feldspar, and Plagioclase)

Scoria (Vesicular Basalt)

Vesicular Basalt

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene

Basalt

Basalt

Basalt with Iron Oxidation

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

River Cobble (likely Basalt or Rhyolite)

Extrusive Igneous Rock (Mafic or Intermediate)

Basalt with Vesicles

Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Granite (specifically Pink or Alkali Feldspar Granite)

Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)

Granite

Granitoid (composition typically SiO2, Al2O3, K2O, Na2O)

Granite (specifically Pink Granite)

Phaneritic Plutonic Rock (High Potassium Feldspar Granite)

Granite

Granite (Felsic Plutonic Rock)

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Volcanic Rock) with Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) inclusions

Granite

Granite (Felsic Plutonic Rock)

Greenstone / Greenstone Pebble

Greenschist (metamorphosed basalt or gabbro)

Citrine Quartz

Silicon Dioxide (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2)

Olivine (Peridotite)

Olivine Group; (Mg, Fe)2SiO4

Granite

Granite (compositionally: Quartz, Feldspar, Mica)

Granite

Granite

Kimberlite with Diamond

Kimberlite (Porphyritic Peridotite)

Pink Granite

Phaneritic plutonic rock (dominated by Alkali Feldspar)

Epidote in Basalt

Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)

Snowflake Obsidian

Spherulitic Obsidian (SiO2 + impurities)

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)

Blue Apatite

Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))