Kal'gerion gem rock

A Kal'Gerion gem rock is an unique type of rock that yield gems, rather than ore, when mined. They give 75 Mining experience per rock, regardless of what gem is mined. At least 50 mining is required to mine these rocks. The chance of mining an additional ore while wearing Varrock armour does not apply to gem rocks.

The types of gems that can be mined are:


 * Opal
 * Topaz
 * Jade
 * Sapphire
 * Emerald
 * Ruby