Spectrolite Rough Slab

*Ylämaa spectrolite quarries, Ylämaa area, Lappeenranta, South Karelia, Finland
*45 x 23 x 4mm overall

A rough slab ready for you to polish.  The actual crystal outline can be seen in the flash. This is one really cool slab!

Spectrolite is a rare form of labradorite that is mined exclusively in Ylämaa, Finland, and officially recognized as Finland's national gemstone. Discovered during WWII defense construction in 1940, it differs from ordinary labradorite by having an opaque dark base and displaying a rich, full-spectrum iridescence reminiscent of the Northern Lights.