Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Jade
There are two distinct minerals classified as Jade: Jadeite (Na(Al,Fe3+)Si2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the image showing translucent, somewhat fibrous material, it is likely Nephrite.
Mineral
Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8
igneous
Vesicular Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)
igneous
Seraphinite
Clinochlore (a variety of the chlorite group)
mineral
Ruby in Fuchsite
Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)
Mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Soapstone / Steatite
Steatite (primarily Talc, Mg3Si4O10(OH)2)
metamorphic
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Quartz-veined Basalt
Amygdaloidal or Porphyritic Basalt with Silicon Dioxide (SiO2) vein
igneous
Moss Agate
SiO2 (Silicon Dioxide) with dendritic inclusions
Mineral
Marble
Metamorphosed Limestone (main mineral: Calcite, CaCO3)
metamorphic
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt
igneous
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Basalt
Mafic volcanic rock, primarily composed of Plagioclase, Pyroxene, and Olivine
Igneous
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
metamorphic
Sandstone (Cross-bedded Drill Core)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Schist (Graphite or Mica rich)
Crystalline Schist (often containing Muscovite, Biotite, or Graphite)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Basalt with Scoria/Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral (man-enhanced)
African Turquoise
Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)
sedimentary
Basalt with Desert Varnish
Mafic Volcanic Rock (Fe/Mg rich Silicate)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Diorite (with Iron Staining)
Phaneritic Intermediate Igneous Rock
igneous
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz - SiO2)
sedimentary
Basalt
Basalt (dominated by plagioclase feldspar and pyroxene minerals)
Igneous
Basalt
Extrusive mafic igneous rock
igneous
Garnet Schist
Almandine-Muscovite Schist
metamorphic
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Mica Schist
Mica Schist (primarily Muscovite and Biotite phyllosilicates)
metamorphic
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)
igneous
Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Organic Mineraloid
Basalt
Extrusive mafic igneous rock
igneous
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Basalt
Extrusive Mafic Igneous Rock
igneous