Basalt with Phenocrysts
Porphyritic Basalt
igneous
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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K2 Jasper (K2 Stone)
Azurite in Granite / Quartzite
metamorphic
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Limestone (Weathered / Limonite-stained)
Sedimentary carbonate rock (CaCO3)
sedimentary
Vesicular Basalt
Basalt with secondary mineral infills
igneous
Granite
Phaneritic intrusive igneous rock (primarily SiO2)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)
Igneous
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Granite (White Granite variant)
Phaneritic Plutonic Rock (High-silica Felsic)
igneous
Granite
Granitoid
igneous
Gneiss (or Granite Gneiss)
Metamorphic rock rich in quartz, feldspar, and biotite/amphibole
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Snowflake Obsidian
Volcanic glass containing Cristobalite (SiO2)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Jade
There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.
Mineral
Granite
Felsic Plutonic Rock
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Fossilized Shark Tooth
Elasmobranchii fossil (likely Odontaspididae family)
sedimentary
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mineral
Pegmatite with Lepidolite and Feldspar
Pegmatite (containing K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 and KAlSi3O8)
igneous
Sandstone (Lithic Wacke)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
sedimentary
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Schist
Mica Schist
metamorphic
Graphic Granite / Pegmatite
Graphic Granite (Alkali Feldspar and Quartz)
igneous
Granite
Granite (Phaneritic Quartz-Feldspar intrusive rock)
Igneous
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
mineral
Aura Quartz (Rainbow Quartz)
Silicon Dioxide (SiO2) with metallic vapor coatings
mineral
Gneiss
Gneiss
metamorphic
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with CaCO3 veins
igneous
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
igneous
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Milky Quartz with Mica Matrix
SiO2 (Silicon Dioxide) with Muscovite/Biotite mica
mineral
Titanium Aura Quartz
Silicon Dioxide (SiO2) coated with Titanium and Niobium
mineral
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primarily)
sedimentary
Diorite
Plutonic Igneous Rock (NaAlSi3O8, CaAl2Si2O8)
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Granodiorite (River Cobble)
Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Dyed Agate
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic