3.23 Carats Trillion Danburite GemstoneDanburite is a calcium boron silicate mineral which is prized for its great clarity and brilliance. Named after the place where it was first discovered, Danbury, Connecticut, this gemstone has a very high refractive index that rivals that of diamonds. This results in a stunning light performance. This 3. 23 carat natural danburite displays the stones remarkable properties in a lovely trillion cut. The triangular shape, with its three equal sides,