Sandstone (Quartzose)
Arenite (composed mainly of SiO2)
sedimentary
Category
Synthetic Or Natural Fiber
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Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Shiva Lingam
Cryptocrystalline Quartz (Jasper) with Iron Oxide inclusions
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Aventurine
Aventurine (Silicon Dioxide with Fuchsite inclusions) - SiO2
mineral
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Pearl
Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3
mineral
Blue Onyx (Dyed Agate)
Cryptocrystalline Quartz (SiO2) with artificial pigment
mineral
Prasiolite
Silicon Dioxide (SiO2)
mineral
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial byproduct)
mineraloid
Purple Dyed Agate Geode (Banded Chalcedony)
Silicon Dioxide (SiO2) - variety: Agate
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Dyed Blue Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Sandstone
Arenite
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
White Topaz
Topaz - Al2SiO4(F,OH)2
mineral
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Mineral
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
mineral
Blue Sapphire (Raw)
Corundum (Al2O3)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions
metamorphic
Banded Siltstone
Siltstone with rhythmic bedding
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (compositionally various, primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Granite
Phaneritic intrusive igneous rock
igneous
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Ambergris
Ambra grisea (Metabolic byproduct)
Organic (Geological relative)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)
mineral
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Green Aventurine (Propably a tumbled variety)
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Banded Sandstone (Hag Stone)
Arenite Sandstone (SiO2 with impurities)
sedimentary
Gold-bearing Quartz
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary