Crystals for Mac

From Crescent Vision Interactive:

Crystals is strategy/puzzle game where you must build up large crystal formations from an array of individual crystals. You have to act fast as asymmetrical formations quickly become unstable and explode! In Crystals, you advance through each level by filling the entire grid with crystal formations. The idea is to do this with as few crystal formations as possible  the larger the formation the better  so as to score higher bonus points.