 green, yellow, brownish to greenish black, may be raspberry-red under incandescent light when chromian; colorless, pale shades of yellow, green, or red in transmitted lightCrystal habitCrystals tabular or short prismatic, prominently striatedCrystal systemOrthorhombicTwinningContact and penetration twins common, often repeated forming rosette structuresCleavageDistinct on (110), imperfect on (010), poor on {001}FractureConchoidal to unevenTenacityBrittleMohs scale hardness8.5LusterVitreousStreakසුදුSpecific gravity3.5 - 3.84Optical propertiesBiaxial (+)Refractive indexnα=1.745 nβ=1.748 nγ=1.754PleochroismX = red; Y = yellow-orange; Z = emerald-green2V angleMeasured: 70°References[1][2][3]Major varietiesAlexandriteColor change; green to redCymophaneChatoyantබෙරිලියම් මූලද්‍රව්‍ය පාදක මැණික් වර්ගයකි.වෛරෝඩි[සංස්කරණය]විනිවිද පෙනෙන කහ පාට කණක වෛරෝඩි නම්වේ. කපා ඹප දැමූ පසු මෙවායේ මැද අලංකාර රේඛාවක් දර්ශණය වේ. කපා ඔපදැමූ වෛරෝඩියක්↑ Handbook of Mineralogy↑ Mindat.org↑ Webmineral d