Heart core is the name of Diana Savitri's jewelry collection. This jewelry is in the form of a bracelet with a gray pendant. This stone pendant is a type of Badr stone. Graystone is believed to give strength to the feet, channeling energy to the earth, and fortitude. Stone pendants measuring 7 CM X 3 CM. This bracelet can be worn on formal or casual occasions. Bracelets can be combined with brightly colored clothes. This type of gray stone is commonly found in Garut. How to care for stones is very easy. Wash with soapy water and wipe gently with another. Then, store it in a dry place away from sunlight.