The Mineral Stilbite

Stilbite Picture

Stilbite Picture

Stilbite Picture

The Zeolite group includes a tectosilicate mineral series that are classified as Stilbite. Before 1997, many considered Stilbite as part of a species of mineral, until the International Mineral Association changed its classification to a series name, simultaneously naming the mineral species as Stilbite-Ca Stilbite-Na Stilbite-Cathat that appears more commonly, is a hydrous silicate of Calcium, Aluminum and sodium with a chemical formula of aCa4(Si27Al9)O72·28(H2O).

In Stilbite-Na, calcium is dominated by sodium.

Chemical Formula  
Stilbite-Ca:NaCa4(Si27Al9)O72·28(H2O)
Stilbite-Na: Na9(Si27Al9)O72·28(H2O)

Derivation of Name  
After the identification in 1818 of the two species, the Germans proposed “Desmine” for Stilbite, while the English continued to use “Stilbite” as a derivation of the Greek word “Stilbein” (meaning, to shine)

Occurrence
Stilbite normally comes in thin tabularcompressed crystals that are parallel to its prevailing cleavage and extended along its axis. Aggregates might be in bow-ties or sheaf-like, as well globular and fibrous. Twinning, penetration plus cruciform is very common.

Gemology
Stilbite is an influenial stone having delicate quality, softly getting a higher sense of self ahead of the cosmological realm. It brings a reassuring power and has been employed to help getting relaxed sleep  and dramatic dreaming. It carries inner peace for the period of meditation.
Some of its uses include:

  • stability and clarity heart chakra
  • unearthing of your accurate dreams and wishes
  • kindle development of mind
  • augment the capacity to learn
  • attain mental balance

Source
Stilbite is found in abudance in the volcanic rocks of Iceland, Isle of Skye, Faroe Islands, Nova Scotia (it is a local mineral there), Bay of Fundy, North Carolina and northern New Jersey. Its salmon-pink crystals crop up among pale green apophyllite in the Deccan Traps close to Mumbai and Pune, India; brown sheafs originate near Paterson, New Jersey in the US; pallid sheaf-like groups cover the calcite of Berufjord near Djupivogr in Iceland; and crystals in brick-red color are created at Old Kilpatrick, Scotland.

Mineralogy
It’s a low-temperature minor hydrothermal mineral. It is sited in the amygdaloidal voids of basaltic volcanic rocks, in gneiss, andesites and hydrothermal veins. It also occurs among deposits of hot springs, and also as a binding agent in various conglomerates and sandstones. Stilbite is yet to be found in deep-sea deposits or sedimentary tuff deposits. Its related minerals include calcite quartz, prehnite plus other zeolited.

Color
It is usually colorless, pink or white. .

Density
2.23 g/cm3

Mohs scale hardness
3.5 to 4

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