The El-Dorado Topaz, which weighs a whopping carats lbs.) currently holds the crown as the largest faceted gemstone in the world. Originally discovered in 1984 in mineral-rich Minas Gerais, Brazil, the pre-cut El-Dorado crystal tipped the sc
Seductive blue chalcanthite crystals are composed of copper, combined with sulfur and other elements and water. This arrangement turns copper, which is required by the body but toxic in excess quantities, into an extremely bio-available crystal.
Patterns in Nature Pyrite replaces the original shell on this fossil ammonite showing that it was buried in sediments with lots of sulphur (S) and iron (Fe). Pyrite or "fool's gold" has the simple chemical formula of FeS.