Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Category
This Appears To Be A Man Made Metallic Object, Likely Jewelry, Not A Natural Rock, Mineral, Or Geological Specimen.
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Granite Pebble
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Hornblende)
igneous
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6 with (Ca, Na)(Al, Si)4O8
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Chert (Field Stone)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Yellow Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Botryoidal Chalcedony (likely Chert or Agatized Coral)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Common Opal or Agate)
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Quartz (Clear Quartz and Rose Quartz variants)
Silicon Dioxide (SiO2)
mineral
Dyed Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartzite (Milky Quartz pebble)
Silicon Dioxide (SiO2)
metamorphic
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Chert / Flint
Chert (SiO2)
sedimentary
Chert (Arrowhead/Tool variety)
Microcrystalline Quartz (SiO2)
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with traces of Iron and Manganese
mineral
Obsidian
Volcanic glass
igneous
Rhodonite
Manganese silicate: (Mn,Fe,Mg,Ca)SiO3
mineral
Basalt (River Stone)
Basalt (SiO2 range 45-52%)
igneous
Snowflake Obsidian (Tumbled)
Obsidian with Cristobalite inclusions
igneous
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (Yellow/Tan Variety)
Chert (SiO2)
sedimentary
Limonite and Goethite encrusted Chert/Ironstone
Hydrated Iron Oxide (FeO(OH)·nH2O) with cryptocrystalline Silica (SiO2)
sedimentary
Orthoclase (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Amber
Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.
Mineral
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Quartzite
Quartzite (SiO2)
metamorphic
Nephrite Jade (River Pebble)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Shale with Iron Oxide Staining
Fissile Mudstone (primarily clay minerals and quartz)
sedimentary
Yellow Chert (Microcrystalline Quartz)
Chert / SiO2 (Silicon Dioxide)
sedimentary
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic