Labradorite is a member of the feldspar group of minerals, which includes moonstone. Labradorite shows a play of colour in lustrous metallic tints, often blue and green, although specimens with the complete spectrum are the most popular for use in jewellery. The name is derived from the Canadian peninsula of Labrador, where the stone was first found in 1770. In the 1940’s Labradorite deposits exhibiting the spectral colours particularly well were discovered in Finland. Stones from this area are known as Spectrolite. Labradorite and Spectrolite are inexpensive gemstones.