Metamorphic Rock (Formed From A Fibrous Crocidolite Asbestos)

Tumbled gray-green stone, likely serpentinite or chlorite-rich metamorphic rock

Serpentinite (predominantly serpentine-group minerals: antigorite, lizardite, or chrysotile); identification is provisional from the photograph

Serpentinized ultramafic rock (serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, olivine, pyroxene, and brucite

Tumbled serpentine or serpentinite

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg₃Si₂O₅(OH)₄

Likely serpentinized ultramafic rock (serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, possibly with magnetite, chromite, and brucite

Tiger's Eye

Silicon Dioxide with Crocidolite inclusions (SiO2)

Tumbled tiger’s-eye-rich quartzite

Quartzite, composed mainly of microcrystalline quartz (SiO₂) with fibrous crocidolite pseudomorphs and iron oxides

Serpentinized ultramafic rock (likely serpentinite)

Serpentinite; chiefly lizardite, antigorite, and/or chrysotile, commonly with magnetite, chromite, and residual olivine/pyroxene

Serpentine (likely polished/tumbled)

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile Mg₃Si₂O₅(OH)₄

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and chrysotile Mg₃Si₂O₅(OH)₄

Likely serpentinite

Serpentinite, composed mainly of serpentine-group minerals (chrysotile, lizardite, antigorite), commonly with magnetite and pyroxene remnants

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

Greenstone (likely serpentinite or chlorite-rich metamorphic rock)

Probable serpentinite/chlorite schist; commonly dominated by serpentine-group minerals, chlorite, talc, and magnetite

Serpentinite

Serpentinite; chiefly serpentine-group minerals (lizardite, antigorite, chrysotile), often with magnetite and minor brucite

Actinolite

Ca2(Mg,Fe)5Si8O22(OH)2

Blue Quartz (Dumortierite Quartz)

SiO2 with inclusion of AlAl6BSi3O18

Serpentine-rich metamorphic rock (possibly serpentinite)

Serpentinite; chiefly antigorite, lizardite, or chrysotile with possible magnetite and carbonate minerals

Weathered mafic metamorphic rock, likely serpentinite or altered basalt

Probably serpentinized ultramafic rock; commonly dominated by serpentine-group minerals, with magnetite and altered pyroxene/olivine

Blue Quartz (Blue Aventurine)

Silicon Dioxide with inclusions (SiO2)

Serpentine-rich greenstone (probable serpentinized ultramafic rock)

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), commonly with magnetite, chromite, and relict olivine/pyroxene

Serpentine-rich ultramafic rock

Serpentinite (predominantly serpentine-group minerals: lizardite, chrysotile, and/or antigorite)

Serpentine-rich metamorphic rock

Serpentinite, likely with quartz or calcite veining and minor magnetite

Serpentinite (serpentine-rich metamorphic rock)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chlorite, talc, and pyroxene

Tiger’s-eye schist (likely golden amphibole-bearing schist)

Quartz–mica schist with fibrous amphibole, commonly riebeckite/crocidolite-derived material

Serpentine-bearing metamorphic rock (likely chromite/vesuvianite-bearing serpentinite)

Serpentinite, chiefly serpentine-group minerals [(Mg,Fe)₃Si₂O₅(OH)₄], with dark accessory minerals

Tumbled serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; commonly Mg₃Si₂O₅(OH)₄

Serpentinite with carbonate and iron-oxide alteration

Serpentinite; chiefly antigorite/lizardite Mg₃Si₂O₅(OH)₄, with magnetite, calcite, and chromian minerals

Serpentinite (serpentinized ultramafic rock)

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with magnetite, brucite, and residual olivine/pyroxene

Blue Quartzite (Blue Aventurine / Dumortierite Quartz)

Quartzite with inclusions (SiO2 with AlAl4BSi3O18)

Serpentinite (serpentinized ultramafic rock), possibly with chromite

Serpentine-group minerals, chiefly lizardite and chrysotile; commonly derived from peridotite or pyroxenite, with possible chromite and magnetite

Serpentinite (serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, brucite, and talc

Tiger's Eye

Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2

Serpentine / Serpentinite

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

Tumbled green stone, likely serpentine

Serpentine-group minerals, chiefly antigorite or lizardite; approximate composition Mg₃Si₂O₅(OH)₄

Serpentinite (serpentinized ultramafic rock)

Serpentinite; chiefly lizardite, chrysotile, and antigorite, commonly with magnetite and minor chromite or carbonate

Chrysotile Asbestos

Chrysotile (Mg3Si2O5(OH)4)

Serpentinite

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Tumbled serpentine

Serpentine-group minerals, commonly antigorite or lizardite; approximate formula Mg₃Si₂O₅(OH)₄

Serpentine (Serpentinite)

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Blue Quartz

Quartz (Silicon Dioxide) with blue inclusions (SiO2)

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile serpentine-group minerals

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)