Amygdaloidal Rhyolite
Rhyolite (felsic volcanic rock) with amygdules
Category
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
Amygdaloidal Rhyolite
Rhyolite (felsic volcanic rock) with amygdules
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Rhyolitic Matrix
Granite
Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
Polished Basalt
Basalt (Mafic volcanic rock)
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
Sodalite (blue beads) and Clear Quartz (clear beads)
Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2
Pink Granite
Granite (Phaneritic igneous rock)
Milky Quartz
Quartz (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
Granite
Granite (Felsic Plutonic Rock)
Labradorite (Larvikite variety)
Feldspar (Plagioclase series), (Na,Ca)(Si,Al)4O8
Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Pink Sapphire
Corundum (Al2O3 with trace Chromium and Iron)
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
Milky Quartz
Silicon Dioxide (SiO2)
Basalt River Stone
Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)
Basalt
Basalt (Mafic Extrusive)
Gneiss with Orthoclase Feldspar
Gneissic Metamorphic Rock with K-Feldspar inclusions
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneissic Metamorphic Rock
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Epidosite (Epidote-rich rock)
Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))
Granite
Granite (Felsic Plutonic Rock)
Granite
Granite (Felsic Plutonic Rock)
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
Granite
Granitoid
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
Quartz Chip
Silicon Dioxide (SiO2)
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
Orange Calcite
Calcium Carbonate (CaCO3)
Clear Quartz Crystal
Silicon Dioxide (SiO2)