Scapolite

5.5 to 6Walter Schumann, Gemstones of the world (2001) More from other references 2.58 to 2.74Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references BrittleWalter Schumann, Gemstones of the world (2001) GoodWalter Schumann, Gemstones of the world (2001) More from other references ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references 1.540 to 1.579Walter Schumann, Gemstones of the world (2001) More from other references Uniaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 0.006 to 0.037Walter Schumann, Gemstones of the world (2001) More from other references Pink stones - distinct: colorless - pink; Yellow stones - distinct: colorless-(yellowish) - yellow; Violet/purple - strong: violet-blue - dark blueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) Violet - strong pleochroism: violet-blue - dark-blueMore from other references 0.017Arthur Thomas, Gemstones (2009) Yes, star 4 (rare). Common pink, violet, colorless cat's eyesHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Yellow, rose-pink, violet, colourlessUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references Various colors, color centers related to irradiation of Cl, CO23 or SO24 - groups present in the large voids of the crystal structureW. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references VitreousArthur Thomas, Gemstones (2009) Pink: orange, pink; Yellow: violet, blue-redWalter Schumann, Gemstones of the world (2001) More from other references There are variable responses with some phosphorescence reportedMichael O?Donoghue, Gems, Sixth Edition (2006) More from other references Yellow specimens from Myanmar give yellow to orange and some East African yellow stones show a very bright yellow-greenMichael O?Donoghue, Gems, Sixth Edition (2006) More from other references There are variable responses with some phosphorescence reportedMichael O?Donoghue, Gems, Sixth Edition (2006) TetragonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Prismatic, usually with flat pyramidal terminations; masses are also known.Michael O?Donoghue, Gems, Sixth Edition (2006) More from other references Occurs in regionally metamorphosed rocks, particularly in marbles.Michael O?Donoghue, Gems, Sixth Edition (2006) Hollow tubes, needle-like crystals - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, p 8 Scapolite information at mindat.org Madagascar  Madagascar, extraLapis, English No.1, 2001, p. 44 Myanmar  Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 446 Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok [var: Meionite] Ted Themelis (2008) Gems & mines of Mogok Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 446 Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Peru  J. Hyrsl (2012) Gemstones of Peru, p. 71 Tajikistan  Zolotarev (1993) Tanzania  Barot et al. (1995) Gemstones of the world, W.Schumann, 2001, p.188 Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 446