Tumbled dark green stone, likely serpentine
Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), possibly with magnetite or chlorite
metamorphic
Category
Metamorphic Rock (For Both Nephrite And Jadeite)
Browse metamorphic rock (for both nephrite and jadeite) specimens identified by the Rock Identifier community.
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Tumbled green aventurine (probable)
Quartz aggregate, SiO₂, commonly containing fuchsite mica inclusions
mineral
Quartz Fragment
Silicon Dioxide (SiO2)
mineral
Weathered feldspar-rich pegmatite or granite outcrop
Quartz–feldspar granitoid, likely containing potassium feldspar (KAlSi₃O₈) and quartz (SiO₂)
igneous
Polished greenstone, likely serpentine
Serpentinite (serpentine-group minerals, chiefly antigorite/lizardite; commonly with magnetite or chlorite)
metamorphic
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Borosilicate mineral/Quartz inclusion)
mineral
Tumbled jasper or altered chalcedony
Microcrystalline quartz (SiO₂), possibly jasper/chalcedony
mineral
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled dark green stone, likely greenstone/serpentinite
Serpentinite (serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄), possibly chlorite-rich greenstone
metamorphic
Tumbled dark green stone, likely serpentine or greenstone
Serpentinite (hydrated magnesium silicate minerals, chiefly antigorite/lizardite); possible chlorite-rich greenstone
metamorphic
Black-and-white granite
Granite, primarily quartz–feldspar–biotite aggregate
igneous
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt with Amygdules
Amygdaloidal Basalt
igneous
Polished agate/jasper pebble
Microcrystalline quartz (chalcedony), SiO₂, with likely iron-oxide and clay inclusions
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Botryoidal aragonite (cave or hydrothermal aragonite)
Aragonite, orthorhombic CaCO₃; likely associated with calcite and minor matrix minerals
mineral
Quartz pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Polished serpentine (likely antigorite or bowenite)
Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄
metamorphic
Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz pebble
Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (high iron oxide content)
sedimentary
Polished green stone, likely serpentine
Serpentinite; chiefly antigorite/lizardite, Mg₃Si₂O₅(OH)₄
metamorphic
Quartz chunk
Silicon dioxide (SiO2)
mineral
Light-gray river pebble
Indeterminate; likely fine-grained quartz-rich rock such as quartzite or pale granite
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Hawk's Eye / Pietersite (Tiger's Eye variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Tumbled blue-green stone, possibly aquamarine or chalcedony
Indeterminate from image; possibilities include beryl (Be₃Al₂Si₆O₁₈) or cryptocrystalline quartz (SiO₂)
gemstone
Green serpentine or nephrite-like stone
Serpentinite, chiefly serpentine-group minerals; exact identification would require testing
metamorphic
Dark green mineral specimen, possibly serpentine or epidote
Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)
mineral
Ruby in Quartz with Tourmaline
Corundum (Al2O3) in Silicon Dioxide (SiO2) with Schorl
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral