Dims: 3.4" x 2.9" x 1.9"(8.6 x 7.4 x 4.8 cm)
Wt: 10.43 oz.(295.6 g)
These are easily the largest Heulandite crystals that I have ever seen. There are two of them laying atop a bed made up of thousands more microscopic crystals. The larger ones, however, are quite visible, with each measuring about 1.5 x 0.8 x 0.5"(3.8 x 2.0 x 1.3 cm). They both have a white coloration and pearly luster, and show small amounts of transparence. They each have very small amounts of damage and exhibit a perfect cleavage in one direction, as shown by the parallel internal fractures that run completely through the crystals. Their forms show a definite monoclinic habit. They and their tiny relatives rest on a matrix of basalt. I never thought that I would see Heulandites this large!