All the Things You Are This is a continuation of yesterday's introduction of diamonds. After all, diamonds are expensive, so today I would like to introduce a gem that could be used instead. The following is an excerpt from my collection. (1) White sapphire The brilliance is inferior to that of diamond, but the Mohs hardness is 9 which is quite hard, so it is often used for rings. (2) Goschenite A beryl-type gem that is the same as the emerald. It is very beautiful, but it may be difficult to make a ring because it has a Mohs hardness of 6 and is soft. (3) Colorless ... Read more »