Heulandite
SpiritRock Shop
Museum Specimens
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Item # HEU08100653
Personal Collection

Red Sheaf Heulandite
Crystals with Apophylite
Crystals on Chalcedony from
Poona, India

$94.00
Here's a Very Special display specimen of Red Sheaf Heulandite with DT Clear
Apophylite crystals on a base of white Chalcedony from our Personal Collection. This
piece is an especially rare and attractive group of Zeolite Minerals. The Heulandite
crystals have a nice vitreous luster. The price we have set on this piece is about 1/2 of
its retail value. Comes with SpiritRock Shop ID Card.
One of a kind specimen!

This specimen weighs 8.3oz, or 0.52 lb (237 g)
and measures 4 x 3.7 x 2.5 inches  (10.2 x 9.5 x 6.3cm)
Heulandite is a hydrated calcium sodium aluminum silicate mineral. Heulandite occurs with Stilbite and other Zeolites
in the amygdaloidal cavities of basaltic volcanic rocks, and occasionally in gneiss and hydrothermal veins. Heulandite
is a member of the Zeolites group and is closely related to Clinoptilolite. The Zeolites group is divided into seven
families: Analcime, Chabazite, Gismondine, Harmotome, Heulandite, Natrolite and Stilbite. Heulandite forms sprays
of complex translucent crystals. They may have a characteristic coffin-shaped formation, but may also form simple
rhombic prisms. It occurs in a variety of colors including clear, white, beige, light yellow, brown, pink, and gray. Less
commonly found are; green, red, burgundy, orange, or black.

Heulandite is one of the more common zeolite minerals. It has a very distinctive crystal form and has a noticeable
pearly luster on cleavage surfaces. Since its original classification, Heulandite was always regarded as a single
mineral species with a variable elemental makeup. In 1997, the Zeolite Subcommittee of the IMA divided this mineral
into individual sub-species, thereby regarding Heulandite as a series of four members. The series is defined by the
presence of several variable elements in the following order: calcium, sodium, potassium, strontium, and barium.

A distinction among the different Heulandite types is rarely made, and the members are generally just termed
Heulandite without further breakdown. Heulandite is named after English mineral dealer Henry Heuland (1778-1856),
who made frequent trips to Iceland collecting Heulandite and other zeolites.
Analcime family:
Analcime
Pollucite
Wairakite
Bellbergite
Bikitaite
Boggsite
Brewsterite
Chabazite family:
Chabazite
Willhendersonite
Cowlesite
Dachiardite
Edingtonite
Epistilbite
Erionite
Faujasite
Ferrierite
Gismondine family:
Amicite
Garronite
Gismondine
Gobbinsite
Gmelinite
Gonnardite
Goosecreekite
Harmotome family:
Harmotome
Phillipsite
Wellsite
Heulandite family:
Clinoptilolite
Heulandite
Laumontite
Levyne
Mazzite
Merlinoite
Montesommaite
Mordenite
Natrolite family:
Mesolite
Natrolite
Scolecite
Offretite
Paranatrolite
Paulingite
Perlialite
Stilbite family:
Barrerite
Stilbite
Stellerite
Thomsonite
Tschernichite
Yugawaralite
Minerals In The Zeolites Group of 7 Families