Kola peninsula is the only one place in the world where natrolite from few known veins can form crystals up to 1m long, but without heads due to very tight conditions of growth. This sphere made from old stock material, surprisingly it shows stong optical effect similar to cat's eye on it surface.Origin: lovozero massif, murmanskaya oblast', northern region, russia. Weight: 717 g / 25,3 oz. Diameter: 85 mm / 3,3 inch. This item is made of natrolite and zeolite, synergy 12.