The Heulandite specimens are most often the ones that fill the void. Deep rich Red Heulandite , pale Orange Heulandite , Pink Heulandite and even Green Heulandite can add color to a zeolite collection as no other zeolite can. One very distinctive type of Heulandite specimen sometimes seen in collections is the Golden Brown Heulandite on Mordenite . We also often see specimens of small translucent bowtie Stellerite. Interestingly Stellerite is not commonly associated with Apophyllite.
Crystals are commonly transparent and colorless.
This would of course be the Mesolite with Green Apophyllite. It CAN resemble Okenite, with its very fine needles. It can be even more delicate than Okenite. It also forms a thin massive layer for some specimens. White Gyrolite is perhaps the most common, but Olive-Green Gyrolite is also quite common.