Yellow Jade (or Carnelian / Chalcedony)
SiO2 (Silicon Dioxide)
mineral
Category
Sedimentary (Volcanic)
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Tumbled Agate
Silicon Dioxide (SiO2)
gemstone
Quartz (Chert / Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
mineral
Common Opal
Hydrated silica (SiO2 "n"H2O)
mineral
Black Opal (Kalimaya)
Hydrated Silica (SiO2·nH2O)
mineraloid
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Polished Jasper (Mushroom Carving)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Bumblebee Jasper
Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)
igneous
Imperial Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions
Sedimentary
Sulfur
Native Sulfur (S8)
mineral
Jasper
Microcrystalline Quartz (SiO2)
mineral
Leopard Skin Jasper
Rhyolite (Silicon Dioxide with impurities), SiO2
igneous
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Weathered porphyritic volcanic rock
Likely altered andesite or rhyolite porphyry
igneous
Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Agate Nodule
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Carnelian
SiO2 (Silicon Dioxide) with Ferric Oxide inclusions
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Greenstone
Metabasalt
metamorphic
Quartz Geode with Calcite/Siderite
Crystalline Silicon Dioxide (SiO2) with Carbonate inclusions
mineral
Amethyst Geode
Amethyst (Silicon Dioxide), Formula: SiO2
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron impurities
mineral
Black Jasper
Silicon Dioxide (SiO2) with carbon/iron impurities
sedimentary
Bumblebee Jasper
Calcite-bearing Volcanic Tuff containing Orpiment (As2S3) and Realgar (As4S4)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Red Jasper (Tumbled)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary