Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Category
Mineral With Metamorphic Or Igneous Host
Browse mineral with metamorphic or igneous host specimens identified by the Rock Identifier community.
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Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
Beryl (likely Pink/Morganite variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Metallic sulfide mineral specimen, likely pyrite
Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate
mineral
Quartz with Schist Inclusion
Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist
metamorphic
Vein-bearing metamorphic rock, likely gneiss or schist
Banded silicate rock; likely quartz–feldspar–mica gneiss with a quartz vein
metamorphic
Pegmatite
Igneous Pegmatite (Quartz-Feldspar-Biotite)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Wishing Stone (Basalt/Metabasalt with Quartz-Feldspar Vein)
Veined Metabasalt / Veined Greywacke
metamorphic
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Serpentinite
Serpentine group minerals ((Mg, Fe)3Si2O5(OH)4)
metamorphic
Quartz with Schorl (Black Tourmaline)
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz with Mica Schist Matrix
Quartz (SiO2) in Mica Schist Matrix
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
sedimentary
Yellow Quartz or Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Milky quartz vein rock
Quartz, silicon dioxide (SiO₂), likely with iron-oxide staining and minor mica or sulfide minerals
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Milky Quartz Pebble with Matrix
Quartz (SiO2)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Milky Quartz with Schist Matrix
Silicon Dioxide (SiO2) with Mica Schist Matrix
mineral
Amethyst-rich vesicular volcanic rock (probable amethyst basalt/scoria)
Quartz (SiO₂) in vesicular basaltic volcanic rock; precise identification requires testing
igneous
Raw Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Banded River Cobble with Mafic Dike
Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion
igneous and sedimentary
Pyrite in Matrix
Iron Sulfide (FeS2) embedded in host rock
mineral
Basalt-Amugydule (Amygdaloidal Basalt)
Aphanitic Mafic Igneous Rock with Vesicle Infillings
igneous
Lapis Lazuli
Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite
metamorphic
Dendritic Agate
Chalcedony (Silicon Dioxide) with Manganese or Iron Oxide inclusions
mineral
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Wishing Stone (Quartz-Veined Basalt)
Amygdaloidal Basalt with Quartz (SiO2) vein
igneous
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Ruby (Raw Corundum)
Corundum (Al2O3:Cr)
mineral
Granitic Pegmatite with Tourmaline/Chlorite
Pegmatite
Igneous
Serpentinite (likely)
Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and minor chlorite/talc
metamorphic
Quartz Vein on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite in Host Rock
Iron Disulfide (FeS2)
mineral
Quartz with Feldspar and Mica (Pegmatite Fragment)
Granitic Pegmatite
igneous
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Mineral
Pyrite in Matrix (Quartz/Schist)
Iron Sulfide (FeS2)
mineral