Uncut thunderstone

An Uncut Thunderstone can be achieved randomly while mining in the Mining Guild, the chances of obtaining an uncut thunderstone are 1/200000 rocks, but by mining with an Upheat Pickaxe, the chance is increased to 1/100000 which is still very rare but obtaining the stone would result in the player owning most powerful gem in the game. It can be cut into a Thunderstone with a Crafting level of 105 giving 5,000 crafting xp. Although the gem is extremely expensive its alchemy value is only 2,000 so if the player dies while holding 3 other items which have an alchemy value higher than 2,000 then the gem would be lost on death.