Sedimentary Or Metamorphic Derived

Tumbled Black Jasper

Silicon Dioxide (SiO2) with iron and carbon inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Red Jasper

Opaque microcrystalline quartz (SiO2) with Hematite inclusions

Aventurine

Quartz with fuchsite inclusions (SiO2)

Rounded quartz pebble

Quartz (silicon dioxide, SiO₂)

Seraphinite

Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8

Cardstock (Paper)

Cellulose (C6H10O5)n

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Aquamarine (Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Feldspar (Orthoclase/Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Rhodonite

Inosilicate, (Mn,Fe,Mg,Ca)SiO3

Serpentinized ultramafic rock (likely serpentinite)

Serpentinite; chiefly antigorite/lizardite/chrysotile, commonly after peridotite (olivine–pyroxene)

Serpentinized ultramafic rock (likely serpentinite)

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

Likely serpentinized ultramafic rock (serpentinite)

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

Serpentinite with green serpentine inclusion

Serpentinite; serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile, with possible magnetite

Serpentinized ultramafic rock with magnesite

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with likely magnesite (MgCO₃) and minor chromite/magnetite

Greenstone / serpentinized ultramafic rock (probable)

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

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper

Silicon Dioxide (SiO2) containing Iron Oxide inclusions

Red Jasper

Jasper (SiO2) - Silicon Dioxide with Hematic impurities

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Yellow Jasper

Cryptocrystalline Quartz (SiO2)

Red Jasper

Jasper (SiO2 with Fe2O3 inclusions)

Unakite

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Jasper

Jasper (Silicon Dioxide, SiO2)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Common Opal (Green Opal)

Hydrated Silicon Dioxide (SiO2·nH2O)

Pearl-bearing oyster shell

Nacreous shell, primarily aragonite (CaCO₃), with natural pearls (calcium-carbonate nacre)

Mica Schist

Mica Schist (primarily muscovite and biotite)

Unakite

Unakite (Epidotized Granite)

Chalcedony (Common Opal variant)

Silicon dioxide (SiO2) with microcrystalline structure

Weathered quartz-rich pebble

Quartz (SiO₂), possibly quartzite or quartz-bearing vein rock

Banded gneiss pebble

Gneiss, a foliated metamorphic rock composed mainly of quartz, feldspar, and dark biotite or amphibole

Likely serpentinized ultramafic rock (serpentinite)

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

Serpentinite (likely serpentinized ultramafic rock)

Serpentine-group minerals, chiefly lizardite, chrysotile, and/or antigorite; commonly derived from peridotite

Feldspar (likely Orthoclase or Plagioclase)

Tectosilicate Feldspar (KAlSi3O8 to (Ca,Na)(Al,Si)4O8)

Zoisite with Ruby (Anyolite)

Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)