
This is among the rarest of gem-stones, and it is highly prized by collectors. The crystals, that are prismatic or having a thick, tabular habit, vary from colourless to deep bluish green, but the very best specimens really are a very delicate bluish green. Nevertheless, phosphophyllite is rarely cut, since the material is brittle and fragile, and large crystals are extremely valuable to become split up.
The best crystals, and the only real ones to become faceted, are from Bolivia. Other localities include Germany and Nh (USA).
Jewellery is one of the most bought products online. An estimated $1 billion USD of diamonds are bought annually via the Internet. Over 40 million people use the Internet to trade!