හරිතමණී

හරිතමණී හෙවත් ජේඩයිට්
Jadeite from Burma
General
Category	Pyroxene group
රසායනික සූත්‍රය	NaAlSi2O6 or Na(Al,Fe3+)Si2O6
Strunz classification	9.DA.25
Crystal symmetry	C2/c
Identification
පාට / පැහැය	Apple-green, emerald-green, bluish green, leek-green, purplish blue, greenish white, white, black, may show green spots, rarely blue or violet; colorless in thin section. Often also banded.
Crystal habit	Commonly massive, or fibrous, granular; prismatic crystals rare
Crystal system	Monoclinic
Twinning	Single and lamellar twinning on [100] and [001]
Cleavage	Good on [110]
Fracture	Splintery
Mohs scale hardness	6.5–7
Luster	Subvitreous, pearly on cleavages
Streak	White
Diaphaneity	Translucent
Specific gravity	3.24 to 3.43
Polish luster	vitreous to greasy
Optical properties	Biaxial (+)
Refractive index	nα = 1.654 – 1.673 nβ = 1.659 – 1.679 nγ = 1.667 – 1.693
Birefringence	δ = 0.013 – 0.020
Dispersion	r > v; moderate to strong.
Ultraviolet fluorescence	Dark colors are generally inert. Light green – inert to weak white in long wave, generally inert in short wave; light yellow – inert to weak green in long wave, generally inert in short wave; white – inert to weak in long wave, generally inert in short wave; light purple – inert to weak white or weak brownish red in long wave, generally inert in short wave; some dyed lavender colors – moderate to strong orange in long wave, weaker in short wave
References