Vesicular Basalt
Basalt (Mafic volcanic rock)
igneous
Category
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Picture Jasper
SiO2
Mineral/Sedimentary
Quartzite
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Conglomerate
Conglomerate (Rock composed predominantly of rounded clasts > 2mm)
sedimentary
Diorite (Dalmatian Stone variant)
Phaneritic Plutonic Igneous Rock (Medium to Fine-grained Diorite)
igneous
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
mineral
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Bauxite
Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)
sedimentary
Carnelian
Carnelian (Microcrystalline Quartz, SiO2 with Fe2O3 impurities)
Mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Dalmatian Stone
Dalmatian Jasper (actually a Peralkaline Igneous Rock)
igneous
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Carnelian Agate
Carnelian (Silicon Dioxide, SiO2)
mineral
Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Vuggy Quartz / Chert
Silicon Dioxide (SiO2)
sedimentary
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Gneiss
Gneiss
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Bloodstone (Heliotrope)
Chalcedony (cryptocrystalline Quartz, SiO2) with inclusions of Iron Oxide/Hematite
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Rose Quartz
Rose Quartz (SiO2 with traces of Titanium, Iron, or Manganese)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
sedimentary
Banded Sandstone
Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)
sedimentary
Fluorite
Calcium fluoride (CaF2)
mineral
Yellow Jasper
Silicon Dioxide with Iron inclusions (SiO2)
sedimentary
White Agate (Tumbled)
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusions of AlAl6BSi3O18
mineral
Dendritic Limestone
Calcite with Manganese Oxide (Manganese Dendrites)
sedimentary
Fluorite (Purple variety)
Calcium Fluoride (CaF2)
mineral
Crushed Limestone
Sedimentary Carbonate Rock (CaCO3)
sedimentary
Limestone
CaCO3 (principally composed of Calcite)
sedimentary
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
igneous