Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Breciated Chert
Brecciated Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Iron-Stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide impurities
mineral
Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Quartz (Pegmatitic Quartz with Feldspar)
SiO2 (Silicon Dioxide)
mineral
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Pink Feldspar
Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8
mineral
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (partially iron-stained)
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Red Garnet
Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)
Mineral
Chert (Quartz-rich)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Glaucophane / Blue Schist
Glaucophane (Na2(Mg3Al2)Si8O22(OH)2)
metamorphic
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Chert (including Common Opal and Chalcedony)
Silicon Dioxide (SiO2 · nH2O)
sedimentary
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Polished Yellow Jaspar
Chalcedony / Quartz (SiO2 with Iron Oxides)
sedimentary
Quartz with Mica
Silicon Dioxide (SiO2) with Mica group inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
sedimentary
Dinosaur Bone
Agatized Dinosaur Bone
sedimentary/fossil
Green Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint / Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Polished serpentine pendulum
Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Gabbro
Gabbro
igneous
Ferruginous Quartz (Red Quartz)
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese
mineral
Garnet (likely Almandine or Pyrope)
Garnet Group (e.g., Almandine: Fe3Al2(SiO4)3; Pyrope: Mg3Al2(SiO4)3)
Mineral
Chert (varietal Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Glass Nugget (Tumbled Glass)
Amorphous Silicon Dioxide (SiO2) with additives
mineraloid (man-made)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary