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Gem rocks

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Classic Runestone
Gem rocks
Gem Rock
Release date 27 January 2003 (Update)
Members? Yes
Quest? No
Level 40
Experience 65
Ore Gems
Max output 1
Location Shilo Village, Lunar Isle mine Al Kharid mining site resource dungeon
Examine
This rock contains gems.
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Gem rocks are a unique type of rock that yield gems, rather than ore, when mined. They give 65 Mining experience per rock, regardless of what gem is mined. 40 mining is required to mine these rocks. The Gem Rock takes about a minute and twenty five seconds to restore, though the rate changes depending on how many players are connected to the server. 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:

The gem received is random - rocks are not bound to specific gems, except for the rocks found during The Tale of the Muspah. It is rare to receive more expensive gems such as rubies and diamonds. Gems are mined at a faster rate while wearing a charged Amulet of glory and Ring of wealth. Wearing a Ring of wealth also gives a small chance to get two gems from one rock (a message will appear when this occurs).

A popular technique when mining these rocks is to bring a chisel and cut and fletch the gems into bolt tips thus reducing the need to bank. Another popular technique is to drop the less valuable gems such as jades and opals to maximise the amount of money made.

The Gem Rocks can be used with the Gem bag reward from Dungeoneering for minimal banking by fletching the cheaper gems to bolt tips and saving the more expensive gems.

Based on a sample of 2084 consecutively mined gems at Shilo Village with a Rune pickaxe and Amulet of glory, the chance of mining each type of gem is as follows:

Gem Type Approx. chance of mining Current GE Value
Uncut Opal 46.4% Coins 100 134
Uncut Jade 21.9% Coins 100 231
Uncut red topaz 12.7% Coins 250 582
Uncut Sapphire 7% Coins 1000 1,368
Uncut Emerald 4.1% Coins 1000 2,997
Uncut Ruby 3.7% Coins 1000 3,806
Uncut Diamond 3.5% Coins 1000 6,277

Based on the above table, this means on average the player will earn 765.833 coins per rock mined, or an average of 27.69 Crafting experience and 4.8429 Fletching experience should the player decide to create bolt tips, assuming no gems are accidentally crushed.

Based on a sample of 501 consecutively mined gems at the Al Kharid Resource Dungeon with a Rune pickaxe, the chance of mining each type of gem is as follows:

Gem Type Approx. chance of mining Current GE Value
Uncut Opal 51.1% Coins 100 134
Uncut Jade 24.6% Coins 100 231
Uncut red topaz 9.6% Coins 250 582
Uncut Sapphire 5.8% Coins 1000 1,368
Uncut Emerald 4.2% Coins 1000 2,997
Uncut Ruby 2.8% Coins 1000 3,806
Uncut Diamond 2.0% Coins 1000 6,277

Based on the above table, this means on average the player will earn Coins 250 618.5 per rock mined, or an average of 25.25 Crafting experience and 2.5513 Fletching experience should the player decide to create bolt tips, assuming no gems are accidentally crushed.

LocationsEdit

Tai Bwo Wannai Cleanup minigameEdit

Cleanup gem rock

A gem rock in the 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 colours of these gems are not an indication of which gems the player will actually mine.

TriviaEdit

  • The rocks appear to only contain purple gems (dragonstone), but they can't be mined from a gem rock. The Gem rocks in Tai Bwo Wannai Cleanup look more like what's inside; they show Opal, Topaz and Jade.
  • If two players begin mining a gem rock at the same time, occasionally both will receive a gem from the rock.
  • When the gem rock is mined, the xp lamp sound will play.

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