Amygdaloidal Basalt with Quartz/Zeolite Infill
Amygdaloidal Basalt (extrusive volcanic rock with SiO2 or CaAl2Si3O10·3H2O infill)
igneous
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Greenstone
Greenschist
metamorphic
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
sedimentary
Milky or Iron-Stained Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Jasper/Flint Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Green Fluorite (Fluorite Sphere)
Calcium Fluoride (CaF2)
mineral
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
sedimentary
Serpentine
Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Granite Pebble
Felsic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Serpentine (Nephrite-like Serpentine)
Serpentinite (Hydrous magnesium iron phyllosilicate)
metamorphic
Topaz
Topaz (Al2SiO4(F,OH)2)
Mineral
Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Pegmatite (with smoky quartz and tourmaline/biotite)
Pegmatitic Granite
igneous
Pumice
Pumice (Vesicular Felsic Glass)
igneous
Obsidian
Amorphous Volcanic Glass (primarily SiO2)
igneous
Basalt
Basalt
igneous
Greenschist (Greenstone)
Greenschist
metamorphic
Amethyst Geodes
Silicon Dioxide (Quartz with Iron impurities), SiO2
mineral
Limonite-stained Chert
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Specular Hematite
Hematite (Fe2O3)
mineral
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Mica Schist
Crystalline Schist (often containing Muscovite, Biotite, and Quartz)
metamorphic
Granitic Pegmatite
Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)
igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Dalmatian Stone
Dalmatian Stone (a fine-grained igneous rock, often misidentified as Dalmatian Jasper)
igneous
Dalmation Stone (frequently called Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock
igneous
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 principal component)
sedimentary
Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolites, Calcite, or Quartz)
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Sandstone
Arenite (Siliclastic sedimentary rock, primarily SiO2)
sedimentary
Schist (Chlorite or Mica-rich)
Chlorite Schist
metamorphic
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary