Tanzanites are becoming more and more popular to use as a symbol of love in an engagement ring and it is believed to imbue the wearer with gifts of eternal truth, honesty and knowledge of higher spiritual love and light. Tanzanite has only been discovered around 1969 at the base of Kilimanjaro and this beautiful  blue/purple stone has been added as one of the birthstones for the month of December. With a Mohs hardness rating of 6.5 to 7.0, tanzanites can be used for engagement and wedding rings, but it does require special care. Tanzanite is stable under normal wearing conditions, which means it’s resistant to the effects of heat, light, and common chemicals but should not be subjected to very high temperatures or sudden temperature changes. It can be damaged by exposure to hydrochloric and hydrofluoric acids. It is recommended to clean your tanzanite ring with warm soapy water and avoid frequent cleans with ultrasonic or steam.  If you choose to wear a tanzanite as an engagement ring  you should take precautions against rough wearing or hard blows and be aware that a tanzanite will scratch over time.