ICYMI DC Rainmaker has a nice breakdown of the efficiency of the 6 solar. The 6x Solar has "Corning Gorilla Glass 3 with DX Coating", which is pretty solid durability wise, but it will not be anywhere nearly as strong as the Sapphire glass. The solar charging does work (and works quite well!
After tweaking the formulation of the glass and carrying out more testing, they found that when Gorilla Glass 4 was dropped from a height of 1 meter onto rough surfaces, it survived 80% of the
GF1J. 88 265 434 218 422 346 395 363 492
gorilla glass 3 vs 5 which is better