Spectrolite is a rare gemstone. Spectrolite is a member of the feldspar labradorite stone family, but for its colouring, it has very little to do with gemstones called labradorite. If anything, spectrolite is a Suomilite (Suomi is the Finnish name for Finland), and indeed, it was entitled a gem name of its own because of the rainbow rich variety and depth of the colours it displays - labradorites do not come even close to the brilliance of spectrolite. The quarrying of Spectrolite began after the Second World War and has become a significant local industry. In 1973 the first workshop in Ylämaa became cutting and polishing Spectrolite for jewelry.