Cancrinite

Colorless material that has been reported to acquire blue veins on being irradiated with X-rays (Pough and Rogers, 1947). One assumes that this is the fibrous variety described by Webster . One would expect this change to be reversed by heat, and fading in light is also a possibility � Nassau (1984) 5 to 6Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 2.42 to 2.52Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references PerfectHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references ConchoidalArthur Thomas, Gemstones (2009) 1.491 to 1.524Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Uniaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 0.022 to 0.026Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Yellow, orange, colourless, white, bluish, pink.Walter Schumann, Gemstones of the world (2001) More from other references Transparent,TranslucentWalter Schumann, Gemstones of the world (2001) More from other references Vitreous,PearlyArthur Thomas, Gemstones (2009) InertHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Orange-yellow responseMichael O?Donoghue, Gems, Sixth Edition (2006) HexagonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Fibrous aggregateHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Cancrinite is found in pegmatites in nepheline syenitesMichael O?Donoghue, Gems, Sixth Edition (2006) Cancrinite information at mindat.org Canada  Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 394 Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 394 Myanmar  Ted Themelis (2008) Gems & mines of Mogok