Galena
Lead(II) sulfide (PbS)
mineral
Category
Man Made Byproduct (Often Mistaken For Obsidian Or Emerald)
Browse man made byproduct (often mistaken for obsidian or emerald) specimens identified by the Rock Identifier community.
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Yellow Quartz (Chalcedony or Agate)
Silicon Dioxide (SiO2)
mineral
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Kambaba Jasper
Stromatolite / Fossilized Algae (Rhyolitic structure)
sedimentary
Quartzite with inclusions
Quartzite (SiO2)
metamorphic
Banded Agate (specifically Sardonyx Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Red Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Serpentinite
Serpentinite (complex of Antigorite, Lizardite, and Chrysotile, Mg3Si2O5(OH)4)
metamorphic
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
White Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Pink Quartzite
Quartzite (mainly SiO2 with iron oxide impurities)
metamorphic
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Serpentine
Serpentinite (group of minerals including Antigorite, Lizardite, or Chrysotile) (Mg, Fe)3Si2O5(OH)4
metamorphic
Selenite (Gypsum)
Hydrous calcium sulfate (CaSO4·2H2O)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Greenstone
Greenschist
metamorphic
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartz (Smoky/Grey Variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Oxide)
Arenite with Limonite/Hematite staining
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Crazy Lace Agate
Cryptocrystalline Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Basalt
igneous
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral