London blue is a beautiful color of topaz, one of the mostcommon gemstones in the jewelry trade. One reason for its popularity is that topazforms naturally in many colors including brown, yellow, green, orange, red, purple, and pink.
Topaz is not shy about its size, with the largest mined crystal weighing 596 pounds. Although it is mined in numerous countries, the world's major source for topaz is Brazil.
London Blue Topaz
