Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Category
Mineral, Variety Of Chalcedony (Microcrystalline Quartz)
Browse mineral, variety of chalcedony (microcrystalline quartz) specimens identified by the Rock Identifier community.
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
igneous
Red Jasper
Silicon Dioxide (SiO2) - Opaque Chalcedony
sedimentary
Quartz Crystal
Quartz (SiO₂)
Mineral
Chert (Nodular Chert)
Microcrystalline Silica (SiO2)
sedimentary
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Quartzite (Iron-stained)
Quartzite (primarily SiO2)
metamorphic
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
sedimentary
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Rose Quartz
Rose Quartz (SiO2)
Mineral
Dyed Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Blue Quartzite
Quartzite (primarily SiO2 with inclusions)
metamorphic
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Jasper in Rhyolite matrix
Silicon Dioxide (SiO2) with various inclusions in Felsic Igneous matrix
igneous
Chert (specifically Jasper or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Beryl (likely Aquamarine) in matrix
Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Ocean Jasper
Orbicular Jasper (Silicon Dioxide SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
Mineral
Amethyst Quartz
SiO2 (Silicon Dioxide)
Mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Quartzite (Milky Quartz Cobble)
Silicon Dioxide (SiO2)
Metamorphic
Turritella Agate (Fossiliferous Chert)
Silicified Elimia tenera (Fossiliferous Chalcedony)
sedimentary
Citrine
Silicon dioxide (SiO2)
mineral
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
igneous
Ocean Jasper
Orbicular Jasper (Silicon Dioxide - SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Pink Banded Onyx (Mexican Onyx / Calcite)
Calcite (CaCO3) - microcrystalline calcium carbonate
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic