Gem rocks

Gem rocks yield gems when mined instead of ore. They give 65 Mining experience per rock, regardless of what gem is mined. 40 mining is required to mine these rocks.

The types of gems that can be mined are:


 * Opal
 * Jade
 * Red topaz
 * Sapphire
 * Emerald
 * Ruby
 * Diamond

The gem received is random - rocks are not bound to specific gems. It is rare to receive more expensive gems such as rubies and diamonds. Gems are mined at a faster rate while wearing a fully charged amulet of glory.

Respawn time is about a minute, though the rate changes depending on how many players are connected to the server.

Locations

 * Shilo Village after completing the Shilo Village quest.
 * Shilo Village mining dungeon after completing hard tasks of karamja achievement diary.
 * Lunar Mine after completing Lunar Diplomacy.

Tai Bwo Wannai Cleanup Minigame
Gem rocks can be found randomly while hacking jungle in the Tai Bwo Wannai Cleanup minigame. When a player discovers one, a message will appear saying: "The jungle parts to reveal a gem-rich rock". These rocks have gems encrusted on the surface, which disappear as the player mines it. The rock may be mined three times before disappearing. The colors of these gems are not an indication of which gems the player will actually mine.

Trivia

 * Some players believe that this rock can have EVERY gem, including Onyx and Dragonstone. This is not true.