20.8 cts "RARE" Untreated Natural Bicolored Sapphire - Rough- 4.16 g

This piece features a rare untreated natural bicolored sapphire in rough form, weighing 20.8 carats and about 4.16 grams. Sapphires are a variety of the mineral corundum, prized for their hardness and wide range of colors. A bicolored sapphire displays two distinct colors within a single crystal, a phenomenon valued both aesthetically and for its uniqueness. Such sapphires occur due to varying trace elements and growth conditions during crystal formation, creating zones of different hues, often in blues, yellows, pinks, or greens. Being untreated means the sapphire's natural color and clarity have not been enhanced by heat or chemical processes, which is significant for collectors and connoisseurs prioritizing natural specimens. Rough sapphires like this can be cut to reveal their color zones or kept as minerals to showcase their natural form. Overall, bicolored sapphires represent an intriguing intersection of gemology and mineralogy due to their complex coloration and unaltered nature.