හරිතමණී
(ජේඩයිට් වෙතින් යළි-යොමු කරන ලදි)
| 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[1] |
| 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[1] |
| References | [2][3][4] |
- ^ a b (Gia), Gemological. Gem Reference Guide. City: Gemological Institute of America (GIA), 1988. ISBN 0-87311-019-6
- ^ "Handbook of Mineralogy : Jadeite Na(Al; Fe3+)Si2O6" (PDF). Rruff.geo.arizona.edu. සම්ප්රවේශය 25 January 2022.
- ^ "Jadeite: Mineral information, data and localities". Mindat.org.
- ^ "A to Z List". Webmineral.com.