Each month has at least one gemstone; others have more. Here's what know about December's birthstones. December has three birthstones: tanzanite, turquoise and zircon. Of the three, tanzanite is ...

but these neon-turquoise Paraiba tourmalines are now up there jostling with the world’s finest gemstones. Remarkably – unlike its peers, which have been accessible for millennia – the ...