My periodic table poster is now available! Petalite. Description from the source: Petalite (Li Al Si4 O10 mon.), Mogok, Myanmar (Burma). Isolated, fracturated beige crystal, rare. 2,5x1,6x1 cm; 5 g. Source: Simone Citon Contributor: John Gray Acquired: 30 September, 2008 Text Updated: 1 October, 2008 Price: Trade Size: 1" Composition: LiAlSi4O10