Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Category
Basalt
Browse basalt specimens identified by the Rock Identifier community.
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Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Diorite
Diorite (an intrusive igneous rock)
igneous
Quartz-veined Basalt
Basalt with Quartz Infill (SiO2 + Fe/Mg Silicates)
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Epidote
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Amethyst Geodes
Silicon Dioxide (Quartz with Iron impurities), SiO2
mineral
Olivine (Peridot)
Olivine (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Greenstone
Greenschist / Greenstone (contains epidote, chlorite, and actinolite)
metamorphic
Chalcedony (including Carnelian and Agate variants)
Silicon Dioxide (SiO2)
mineral
Scoria (Lava Rock)
Scoria
igneous
Peridot (Olivine)
Olivine, (Mg, Fe)2SiO4
mineral
Green Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Larimar
Pectolite (NaCa2Si3O8(OH))
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst (Druzy Quartz)
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Common Opal
Hydrated Silica (SiO2·nH2O)
mineral
Andesite
Andesite (Intermediate Volcanic Rock)
igneous
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Malachite or Chrysocolla on Host Rock
Cu2(CO3)(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
mineral
Basalt with Quartz Veining
Veined Basalt (composed primarily of plagioclase feldspar, pyroxene, and olivine with quartz/calcite infill)
igneous
Druzy Quartz on Vesicular Basalt
Silicon Dioxide (SiO2) in an extrusive Mafic igneous host rock
igneous
River Stone (likely Basalt or Diabase)
Mafic Igneous Rock (likely Basalt)
igneous
Quartz Veined Basalt
Mafic Volcanic Rock with Microcrystalline Quartz (SiO2)
igneous
Basalt (Pahoehoe texture)
Mafic Volcanic Rock
igneous
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
igneous
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Carnelian and Mixed Agates
Cryptocrystalline Quartz (SiO2 with Iron Oxide impurities)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Agate (Carnelian type)
Silicon Dioxide (SiO2)
mineral
Sunstone (Feldspar)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with inclusions of Hematite/Goethite
mineral
Magnetite with Pyroxene
Magnetite (Fe3O4) in Mafic Igneous Matrix
mineral/igneous
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Rough Green Sapphire (Corundum)
Corundum (Al2O3 - Aluminum Oxide with trace elements)
mineral
Greenstone
Greenschist
metamorphic
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Ruby
Corundum (Al2O3)
mineral
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
mineral
Prehnite
Prehnite, Ca2Al(AlSi3O10)(OH)2
mineral