Amygdaloidal Basalt with Agate/Chalcedony Infills
Amygdaloidal Basalt (Composition: SiO2 and (Mg,Fe)2SiO4 in matrix; SiO2 in amygdule)
igneous
Category
Igneous Rock
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Granitic Pegmatite
Granitic Pegmatite (primarily SiO2 with KAlSi3O8)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
Basalt with Quartz/Feldspar Inclusions
Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining
igneous
Diabase
Diabase (also known as Dolerite)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock with secondary mineral infilling)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)
igneous
Rough Star Sapphire (Corundum)
Al2O3 (Aluminum Oxide)
mineral
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Amphibolite with Hornblende
Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Basalt
Basalt
igneous
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Labradorite (Larvikite variety)
Ternary feldspar (Anorthoclase), (Na,K)AlSi3O8
igneous
Olivine (Dunite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Pumice
Pumice (Vesicular volcanic glass / Rhyolite or Trachyte)
igneous
Granite
Granite (composed of Quartz, Feldspar, and Mica/Amphibole)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone with Liesegang Rings
Arenite with Iron Oxide Liesegang Banding
sedimentary
Gneiss
Gneiss
metamorphic
Amygdaloidal Basalt
Basalt with secondary mineral infilling (SiO2/CO3)
igneous
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
igneous or sedimentary
Mica (Biotite and Muscovite) in Matrix
Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)
igneous
Pumice
Pumice (a highly vesicular volcanic rock)
igneous
Pebble (Likely Basalt or Siltstone)
Clastic sedimentary rock or mafic volcanic rock
Igneous or Sedimentary
Basalt
Mafic volcanic rock (various silicate minerals)
igneous
Basalt with Plagioclase Phenocryst
Porphyritic Basalt
igneous
Basalt with Quartz Veining
Basalt (Mafic Volcanic Rock) with Silicon Dioxide (SiO2) inclusions
igneous
Porphyritic Basalt
Basalt (SiO2 percentage 45-52%) with phenocrysts
igneous
Granite
Phaneritic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)
igneous
Granodiorite
Granodiorite (Quartz-Feldspar-Biotite Plutonic Rock)
igneous
Pumice
Pumice (volcanic glass)
igneous
Basalt with Olivine inclusion
Mafic Volcanic Basalt (Fe,Mg)2SiO4
igneous
Obsidian
Obsidian (Amorphous volcanic glass)
igneous
Granite
Granite (Phaneritic Quartz-Feldspar-Mica rock)
igneous
Basalt with Quartz Veins
Vesicular or aphanitic Basalt with SiO2 (Quartz) intrusions
Igneous
Basalt
Extrusive volcanic basalt
igneous
Basalt
Basalt
igneous
Pumice
Vesicular volcanic glass
igneous
Porphyritic Basalt (with Amygdules)
Amygdaloidal Porphyritic Basalt
igneous