Prison Prison crystals and mine suits

[Evergreen_MC]

Hello, in prison when we mine a lot we get crystals which were earlier used for buying items from mystery man, but now exp is used. But still when we mine we get crystals and in auction house it also used as currency. But basically it has no use until I found out that it can be used to get mine suits. But there are no such commands for mine suits neither any player knows about it and are telling that they do not exist (God fathers also). But when I was checking the enchantment books I saw there is an book that increases the amt of crystals we get which can we used to upgrade mine suits. I am totally confused whether there any mine suits existing (earlier existed) and also tell what is the use of crystals.