K2 Jasper (Beads)
Granodiorite with Azurite and Malachite
Category
Browse mineral based composite specimens identified by the Rock Identifier community.
K2 Jasper (Beads)
Granodiorite with Azurite and Malachite
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Basalt
Basalt (Igneous Volcanic Rock)
Aquamarine
Aquamarine (Beryl variety) - Be3Al2(Si6O18)
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
Orbicular Jasper
Silicon Dioxide (SiO2), variety of Chalcedony
Likely weathered basalt or mafic volcanic rock
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine or iron oxides
Diorite
Diorite (intermediate intrusive igneous rock)
Basalt
Basalt (Mafic volcanic rock)
Pebble or Cobble (likely composed of sandstone or conglomerate)
Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Corundum
Corundum (Al2O3)
Diorite
Diorite
Diorite with Quartz Vein
Intermediate plutonic igneous rock (Diorite / Metagabbro with SiO2 quartz alteration)
River Rock
Sedimentary Rock (various compositions)
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Quartzite
Quartzite (primarily composed of SiO O₂)
Serpentine
Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄
Weathered porphyritic basalt
Basalt, likely plagioclase-phyric basalt; primarily a fine-grained aggregate of plagioclase feldspar, clinopyroxene, and possibly olivine or iron-titanium oxides
Granite
Granite (a plutonic rock)
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
Chert (often called Flint or Jasper based on color)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Conglomerate
Conglomerate
Moss Agate
Moss Agate (a variety of Chalcedony, SiO ₂)
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Strawberry Quartz
Quartz (SiO₂) with Goethite (α-FeO(OH)) and/or Lepidocrocite (γ-FeO(OH)) inclusions
Mica schist, likely biotite–muscovite schist
Mica schist; predominantly quartz, feldspar, biotite and/or muscovite mica. Exact mineral composition cannot be confirmed from the photograph alone.
Polished black stone egg, probably black obsidian
Obsidian, a natural volcanic glass; composition primarily silica-rich glass (approximately SiO₂), with variable iron and other trace elements
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Basalt
Basalt
Jade
Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.
Serpentine
Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Basalt
Basalt
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
Basalt
Extrusive Igneous Rock
Painted Garden Rock
Coated Siltstone or Mudstone
Granite
Granite (Plutonic Igneous Rock)
Dalmatian Stone (Dalmatian Jasper)
Dalmatian Stone (A variety of Perthite / Aplite)
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
Granite
Felsic Plutonic Rock (Granite)
Sand
Siliciclastic sediment / Quartz sand (SiO2)
Granite
Phaneritic Felsic Igneous Rock