HEULANDITE
HEULANDITE
SPECIMEN NR #:89
Heulandite refers to a series of tecto-silicate minerals within the zeolite group. Until 1997, it was classified as a distinct mineral species; however, the International Mineralogical Association redefined it as a series name that includes specific mineral species such as Heulandite-Ca, Heulandite-Na, Heulandite-K, Heulandite-Sr, and Heulandite-Ba, the latter being described in 2002. Heulandite-Ca, the most prevalent variant, is a hydrous calcium and aluminum silicate represented by the formula (Ca,Na)2−3Al3(Al,Si)2Si13O36·12H2O, with minor sodium and potassium often substituting for calcium. In the heulandite-Sr variety, strontium takes the place of calcium. The designation of species is based on the predominant element, although they are visually indistinguishable, and the term heulandite is still applied when specific testing has not been conducted.
Specimen details
Specimen details
The numbers under "variant" are the measurements in mm and weight in grams. Where known, the origin of the specimen is mentioned. The number at the end, is the specimen number in our collection. Colours may vary, due to photography.
Care
Care
It's important to know that many minerals can be effectively cleaned with water. However, before using any cleaning methods, such as dissolvers or ultrasound, please take the time to research online. Improper use of these techniques could potentially harm your specimen.
Shipping
Shipping
Shipping fees depend on the weight of your order and its destination, and they will be calculated at checkout. Not all platforms use the same rate. We will inform you about any rebates where possible. If you have any questions, feel free to reach out to us before placing your order. We strive to use the most economical shipping methods for your specimens and combine multiple orders to minimize costs. Please note that packaging is included in the shipping fees.
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