Bismuth
 
Bismuth is a chemical element; it has symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental bismuth occurs naturally, and its sulfide and oxide forms are important commercial ores.
 
Lab-grown bismuth crystals are man-made crystals, often exhibiting vibrant colors and unique structures. They are typically formed in a controlled environment, allowing for the creation of large, perfect crystals that might be rare or difficult to find naturally. These crystals are often sought after for their decorative value and scientific interest.