Heulandite is a relatively common mineral, and is found in most zeolite occurrences. Some of the most outstanding crystals come from the state of Maharashtra in India, at the localities of Pune, Jalgaon, Aurangabad, and Nasik. The Shakur Quarry in Nasik is especially known for its dark green Heulandite, formed by inclusions of Celadonite.

Heulandite is amongst the most frequent and probably one of the most well-understood members of the Zeolite Group. It forms complex and unique crystals with a great luster that is pearly beautiful shades of pinks, greens, and yellows.

6 photos of Heulandite Subgroup associated with Mesolite at this locality. The small symbol inside an icon describes the class of locality listed. This can be combined with the three base icon colours (red, green, white) in any combiation. Red icons …

Despite having an international reputation, there are no known images of Henry Heuland. Heulandite is the name applied to specimens of this subgroup with unknown dominance of the extra-framework cations. It comprises heulandite-K, heulandite-Na, heulandite-Ca, heulandite-Ba and heulandite-Sr.

Heulandite is the name of a series of tecto-silicate minerals of the zeolite group. Prior to 1997, heulandite was recognized as a mineral species, but a reclassification in 1997 by the International Mineralogical Association changed it to a series name, with the mineral species being named: Heulandite-Ca; Heulandite-Na; Heulandite-K; Heulandite-Sr

A STRIKING and VERY UNUSUAL specimen of radial sprays of highly lustrous red-brown heulandite capped by colorless heulandite on chlorite-included quartz on basalt matrix from Jalgaon, India. Red heulandite is seldom available.

Large crystals from the Nasik, Poona, and Bombay districts, Maharashtra, India. At Tambar Springs, near Gunnedah, New South Wales, Australia. For the English mineral collector and dealer John Henry Heuland (1778{1856). References: (1) Dana, E.S. (1892) Dana's system of mineralogy, (6th edition), 573{576.

2024年4月18日 · Mineralogy may be contemplated in two points of view. It may be considered as closely connected with the more common affairs of life, and consequently inviting us to pursue it from its utility; or ...

Heulandite-(Ca) has a Mohs hardness of 3.5-4.0, perfect cleavage in one direction, a vitreous-to-pearly luster, and a specific gravity of 2.1-2.3. It is a zeolite mineral that occurs mainly in amygdaloidal cavities in basalt.

2024年12月8日 · India is a major source of heulandite, particularly in the Deccan Traps region. The basaltic lava flows here provide ideal conditions for its formation. Heulandite is also found in Iceland, where volcanic activity is prevalent. The mineral forms in the cavities of basaltic rocks, showcasing the island's fiery origins.