Red Jasper
Jasper (Silica/Microcrystalline Quartz with Hematite inclusions), SiO2
sedimentary
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
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Clear Quartz / Diamond (untested)
Silicon Dioxide (SiO2) or Carbon (C)
mineral
Chert (River Pebble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Rhodochrosite with Quartz
Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
gemstone
Rounded basalt cobble (probable)
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene
igneous
Dyed blue tumbled stone, likely turquoise or howlite
Most likely dyed magnesite/howlite (CaCO₃), possibly turquoise (hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O)
gemstone
Small pale rock fragment
Indeterminate; possibly quartz, calcite, or a weathered feldspar-rich fragment
mineral
Tumbled turquoise
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Tumbled hematite (likely hematite-rich ironstone)
Hematite, Fe₂O₃; possibly mixed with magnetite or goethite
mineral
Quartz-rich metamorphic fragment (likely mica schist)
Mica schist, probably muscovite–quartz schist
metamorphic
Polished opal-like chalcedony
Cryptocrystalline silica, SiO₂; likely common opal or pale chalcedony, with identification limited by the photograph
gemstone
Polished labradorite
Labradorite, plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (Taconite/Itabirite)
sedimentary
Rose Quartz
Silicon dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Common Opal
Hydrated silica (SiO2 "n"H2O)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Mookaite Jasper
Radiolarite (Silica with iron oxides like Goethite and Hematite)
sedimentary
Unakite
Epidotized Granite
metamorphic
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Boxwork Quartz / Septarian Jasper
Boxwork (SiO2 with iron oxide inclusions)
metamorphic
Red Jasper
Silicon Dioxide with Hematite (SiO2 + Fe2O3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Chalcedony/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
Mineral
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2 with impurities)
sedimentary
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Jasper
Jasper (Silicified microcrystalline quartz) - SiO2
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Thunderegg (Agetized Geode nodule)
Rhyolitic Agate Nodule (SiO2 filling volcanic cavities)
igneous
Chlorastrolite (Greenstone)
Chlorastrolite (variety of Pumpellyite) - Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2 · H2O
mineral
Larimar
Pectolite (NaCa2Si3O8(OH))
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Likely weathered quartz-rich stone
Probably quartz-bearing sandstone or milky quartz; exact identification requires testing
mineral