Natural London Blue Topaz 18.50 carats... 100% natural earth mined ..irradiation treatment....top luster fire...top color...VVS quality....Origin - Brazil.....Topaz gets its name from the Greek word topazion, which may originate from the Sanskrit tapas, meaning, Â“fire.Â” Topaz in particular has been said to work with ones creative energies. topaz is also excellent for promoting concentration. Many believed wearing a topaz ring would keep death from coming prematurely and would control insomnia and greed. topaz has also been long believed to be useful for those unable to control lust- a good stone for people with sex addictions. Traditions hold that topaz bestowed many benefits upon its wearer. It would dispel cowardice, calm the temper, cure madness and plague, and sharpen the wit. It was also thought to aid in sleep and eliminate nightmares, as well as cure rheumatism and soreness in the joints. The stone has also been credited with being effective against bleeding and heart disease. It has been said to instantly lose its color to indicate that poison is present, thus protecting its owner. The stone has also been thought to bring fidelity and friendship if constantly worn without being set aside. It was also believed to be an effective talisman against accident and fire, and to bring increased intuition and long life. To Christians, it has been known as a symbol of uprightness and virtue.