Axinite

Color: colorless, yellow, brown, blue bluish Hardness: 6.5 - 7 Refractive index: 1.673 - 1.693 Density: 3.26 - 3.36 Chemical composition: Ca2(Fe,Mn)Al2BSi4O15(OH) Crystal structure: Triclinic Origins: USA, Mexico, Tanzania, Brazil, Pakistan, Afghanistan. Axinite is a collector's stone that is rarely used in jewelry. To invest in Axinite: wwwgemsinvestors.com