Spodumene gemstones in the jewellery market are the only gemstones that appear more frequently. Jeho index lomu je 1.655-1.680, birefringence difference is 0.015, dispersion ratio is 0.015, specific gravity is 3.15-3.20, and hardness is 6.5-7, ale protože má skupinu Dekolt je zcela kompletní, a snadno praskne v důsledku kolize, [...]
