What is Danburite? An Impressive Alternative to Diamond

Danburite is not very well known at the moment but from a very small base is growing in popularityThe crystals are similar to topaz and are completely colourless and are very easily mistaken for a diamond or white sapphire.In my own opinion the lustre of the Danburite is closer to the Diamond than the White Sapphire. The White Sapphire in my view always looks well; 'White' compared with the Diamond which always has a very slight Silver lustre. The Danburite if cut well goes closer to the Diamond in this area I think, but note that the refractive index of Danburite at 1.63 is well short of Diamond at 2.42 so it is unrealistic to expect the Danburite to match the raw Sparkles of the Dimaond