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.

Minerals In The Zeolites Group of 7 Families

Analcime family:

Analcime

Pollucite

Wairakite

Bellbergite

Bikitaite

Boggsite

Brewsterite

Gismondine family:

Amicite

Garronite

Gismondine

Gobbinsite

Gmelinite

Gonnardite

Goosecreekite

Heulandite family:

Clinoptilolite

Heulandite

Laumontite

Levyne

Mazzite

Merlinoite

Montesommaite

Mordenite

Chabazite family:

Chabazite

Willhendersonite

Cowlesite

Dachiardite

Edingtonite

Epistilbite

Erionite

Faujasite

Ferrierite

Stilbite family:

Barrerite

Stilbite

Stellerite

Thomsonite

Tschernichite

Yugawaralite

Natrolite family:

Mesolite

Natrolite

Scolecite

Offretite

Paranatrolite

Paulingite

Perlialite

Harmotome family:

Harmotome

Phillipsite

Wellsite

Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India Red Sheaf Heulandite Crystals with Apophylite Crystals on Chalcedony from Poona, India
Item # HEU08100653

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

$94.00

Sold Out!

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)