Material: Goldstone

FireMountainGems.com tells us that, "Goldstone is man-made colored glass with many glittering inclusions. The earliest example found is from the 1100s, but became known in Venice, linked from the beginning to the medieval art of alchemy. It is called the stone of ambition, is related to Sagittarius and is said to help assist in reaching your goals.
"Blue goldstone is associated with the Heart and Crown Chakras. It is said to transmit healing energy, increase self-acceptance, aid in learning and soothe hypersensitivity, making it ideal for empaths.
"Brown goldstone is associated with the Root Chakra. It is said to generate and revitalize energy fields, transmits positivity and diverts malevolent energy into the earth."

CharmsOfLight.com tells us that, "Goldstone is a man-made stone, with its sparkle due to cobalt or manganese in blue Goldstone. Goldstone is said to be the stone of ambition. It builds energy, courage and a positive attitude. Increases drive and confidence. A gently uplifting stone, Goldstone promotes vitality. Goldstone helps to reduce stomach tensioning benefits arthritic conditions. It is helpful to bones, painful joints and circulation."