Quartz Geode
Silicon Dioxide (SiO2)
mineral
Category
Not A Geological Specimen
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Tektite (Indochinite)
Tektite (Lechatelierite-rich silica glass)
Mineral-like (Natural Glass)
Amber
Succinite (organic fossilized resin)
mineraloid
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Chert (Jasper and Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinite (C10H16O)
Mineraloid
Chalcedony
Chalcedony (a microcrystalline variety of Quartz, SiO2)
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Chert (Carnelian/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Common Opal / Chert
Hydrated silica (SiO2·nH2O) or Microcrystalline Quartz (SiO2)
mineral
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Amber
Succinates (fossilized tree resin), approximately C10H16O
organic gemstone
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (Ironstone)
Limonite (FeOO·nH2O)
mineral
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Chert (Jasper-like)
SiO2 (Cryptocrystalline Quartz)
Sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Banded Agate (with Quartz Geode Center)
Silicon Dioxide (SiO2)
mineral
Fluorite (tumbled pebble)
Calcium Fluoride (CaF2)
mineral
Yellow Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Bauxite
Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Glauconitic Sandstone (or Greenstone)
Glauconitic Sandstone with Quartz
sedimentary
Limonite (Oxidized Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Amber
Resinite / Fossilized Tree Resin
mineral
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock
Conglomerate
Conglomeratic Sandstone
sedimentary
Porphyritic Andesite
Andesite (Porphyritic texture)
igneous
Quartz Geode with Goethite/Hematite
Silicon Dioxide (SiO2) with Iron Oxides
mineral
Jasper
Silicon Dioxide (SiO2)
sedimentary
Chakra Stone (Composite / Man-made Bonded Gemstones)
Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)
Combined Minerals / Metaphysical stones
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Gastropod Internal Mold (Steinkern)
Class Gastropoda fossil mold (Phylum Mollusca)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral