Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Category
Mineral Specimen
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Amazonite
Microcline (KAlSi3O8)
mineral
Prehnite
Ca2Al2Si3O10(OH)2
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Peridot
Olivine (Mg, Fe)2SiO4
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Chalcedony with Quartz
Silicon Dioxide (SiO2)
mineral
Grape Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Quartz (White/Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Emerald (or possibly Green Glass / Slag)
Beryl (Be3Al2(SiO3)6)
gemstone
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chevron Amethyst
Silicon Dioxide with Iron Impurities (SiO2)
mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veining in silicate matrix
sedimentary
Amethyst
Quartz (SiO2)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (SiO2)
gemstone
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Quartz with Spessartine Garnet and Iron Staining
Silicon Dioxide (SiO2) with Almandine-Spessartine (Mn3Al2(SiO4)3)
mineral
Quartz (Raw / Unpolished)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Bumblebee Jasper
Anhydrous Calcium Carbonate with Sulfur and Arsenic (Orpiment/Realgar)
sedimentary
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Desert Rose (Barite Rose / Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrous Calcium Sulfate (CaSO4%22H2O)
mineral
Smoky Quartz with Feldspar
SiO2 (Quartz) with KAlSi3O8 (Feldspar)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony Agate / Carnelian nodules in Matrix
SiO2 (Silicon Dioxide) with iron oxide inclusions
mineral
Geode
Quartz / Chalcedony nodule
sedimentary
Quartz (Chalcedony/Agate nodule)
Silicon dioxide (SiO2)
mineral
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
mineral
Agate Nodule / Chalcedony
Silicon Dioxide (SiO2)
sedimentary