Heulandite Zeolite Specimen

Heulandite is a member of the Zeolite group with characteristic coffin shaped crystals. It was renamed in 1822 after the mineral collector John Heuland, previously it had been known as Euzeolite, translating to ‘beautiful Zeolite’. It is very similar to Stilbite and until 1818 the two were thought to be the same mineral.