This mineral species is relegated to the Alkali Massifs, ie. Mont St Hilaire and Greeenland. I must say that this is one of the finest, albeit small, specimens I have seen of this species. On a gray matrix are two, oil green, translucent, lustrous crystals of narsarsukite. The smaller, pristine crystal measures .7 cm across. rare! 3 x 2.5 x 2 cm