Spodumene gemstones in the jewellery market are the only gemstones that appear more frequently. Its refractive index is 1.655-1.680, birefringence difference is 0.015, dispersion ratio is 0.015, specific gravity is 3.15-3.20, и твердость 6.5-7, but because it has a group The cleavage is quite complete, and it is easy to crack due to collision, [...]
