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tab"... I hope the Great Heavenly Father, who will look down upon us, will give all the tribes His blessing, that we may go forth in peace, and live in peace all our days, and that He will look down upon our children and finally lift us far above this earth; and that our Heavenly Father will look upon our children as His children, that all the tribes may be His children and as we shake hands to-day upon this broad plain, we may forever live in peace."

Red Cloud [Marpiya-Luta]
(late 19th century)
Oglala Sioux chief


  1. ( Charoite info at WebMineral
  2. ( Mindat
  3. ( Mineral Handbook


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From Wikipedia, the free encyclopedia

Category Silicate mineral
Chemical formula K(Ca;Na)2Si4O10(OH;F)·H2O
Color Violet, lilac, light brown
Crystal habit Fibrous, massive
Crystal system Monoclinic - Prismatic 2/m
Cleavage Good in three directions
Mohs scale hardness 5 - 6
Luster Vitreous to pearly
Streak White
Diaphaneity Translucent
Specific gravity 2.54 - 2.58
Optical properties Biaxial (+)
Refractive index nα = 1.550 nβ = 1.553 nγ = 1.559
Birefringence δ = 0.009
Other characteristics Weakly fluorescent
References [1][2][3]

tabCharoite (K(Ca;Na)2Si4O10(OH;F)·H2O)[3] is a rare mineral, first described in 1978 and named for the Chara River.[2] It has been reported only from the Sakha Republic, Yakutia, Siberia, Russia.[3] It is found where a syenite, the Murunskii Massif, has intruded into and altered limestone deposits producing a potassium feldspar metasomatite.[1][2]

tabCharoite is translucent lavender to purple in color with a pearly luster. However, it is a discrete mineral rather than a rock. Charoite is strictly massive in nature, and fractures are conchoidal. It has an unusual swirling, fibrous appearance, sometimes chatoyant, and that, along with its intense color, can lead many to believe at first that it is synthetic or enhanced artificially.

tabThough reportedly discovered in the 1940s, it was not known to the outside world until its description in 1978. It is said to be opaque and unattractive when found in the field, a fact that may have contributed to its late recognition. Charoite is used as an ornamental stone and sometimes a gemstone, generally as cabochons set into pendants.[citation needed]

tabCharoite occurs in association with tinaksite and canasite.[3]



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