Increasing alkali content within the silicate ring channels causes increases to the refractive indices and birefringence. According to the Mohs Hardness Scale, an Aquamarine stone has a 7.five to 8 harness level. Nevertheless, its durability does not imply that these gems never require to be treated effectively. In other words, a one carat aquamarine is significantly rarer than a 20cts stone of the very same colour and as a result…Read More