This is a fine analcime from the historic Type Locality - Mt. Etna, Sicily. It is uncommon on the market and this particular specimen features two distinctly different analcime crystals in the drusy quartz-lined vug in basalt. The sharp, lustrous, yellow crystal is 1.2 cm and the crystal on the other side of the vug is a transparent, gem, analcime. The vug also hosts a white, botryoidal zeolite, which I believe is chabazite.