Blue Sapphire
Corundum (Al2O3)
Category
Browse mineral, variety of quartz specimens identified by the Rock Identifier community.
Blue Sapphire
Corundum (Al2O3)
Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
Chert (Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Blue Chalcedony and Picture Jasper Beads
Blue Chalcedony (SiO2), Picture Jasper (SiO2)
Amethyst Quartz
SiO2 (Silicon Dioxide)
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Beryl (likely Aquamarine) in matrix
Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)
Yellow Jasper (Chert)
Silicon Dioxide (SiO2)
Jasper with Quartz (Agate/Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
White Quartz
Silicon Dioxide (SiO2)
Tiger's Eye (commonly referred to as Blue/Gold Tiger's Eye)
Tiger's Eye is a variety of Chalcedony (cryptocrystalline quartz), SiO2, exhibiting chatoyancy. The blue variety is often called Hawk's Eye.
Citrine
Silicon dioxide (SiO2)
Ocean Jasper
Orbicular Jasper (varietal of SiO2 with impurities)
Smoky Quartz
Silicon Dioxide (SiO2)
Amethyst Sage Agate
Silicon Dioxide (SiO2) with trace minerals (Manganese/Iron oxides)
Chert (Common Opal/Chalcedony)
Microcrystalline Quartz (SiO2)
Jasper with Quartz Vein
Silicon Dioxide (SiO2) with impurities
Banded Jasper (Chert)
Silicon Dioxide (SiO2) - variety of Chalcedony
Chert (Hag Stone / Hole Stone)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Chert (Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
Jasper with Quartz inclusion
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone (Micaceous)
Arenite (primarily SiO2 with Phyllosilicates)
Agate (specifically, likely a geode slice or nodule)
Agate (a variety of Chalcedony, with chemical formula SiO2)
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Mixed Tumbled Gemstones and River Rocks
Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)
Quartz (Citrine or Iron-Stained variety)
Silicon Dioxide (SiO2)
Carnelian (Chalcedony variety)
SiO2 (Silicon Dioxide)
Red Jasper with Quartz and Hematite
Silicon Dioxide (SiO2) with Ferric Iron inclusions
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Diorite
Diorite (Intermediate intrusive igneous rock)
Amazonite
Amazonite (KAlSi3O8, a triclinic variety of Potassium Feldspar)
Chalcedony (specifically Blue Chalcedony or Common Opal variety)
Silicon Dioxide (SiO₂)
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony