Physical Properties of Star Amethyst Stone If someone is searching for a relatively hard and durable gemstone then star amethyst is the perfect option for them as they contain 7 on the Mohs hardness scale. Its color typically varies from purple to violet and sometimes ranges from pale lilac to deep purple. The beautiful crystal is glassy or vitreous in luster, and the diaphaneity ranges from transparent to translucent. Visit us - https://www.sagaciajewelry.com/blogs/news/star-amethyst-history-meaning-healing-properties-zodiac-sign-and-care-tips