Strange rock

The Strange rock is an item from the Shattered Heart Distraction and Diversion. It may be found randomly while training any non-combat skill besides Dungeoneering. Players may get two strange rocks per skill. When you have received the first rock for a skill, the drop chance for the second will be reduced by half. Each strange rock is a segment of the statue of Dahmaroc, a wizard from the Second Age. After the statue of Dahmaroc has been completed, players may then again get two strange rocks per non-combat skill to once again complete the statue. The first time you complete the statue, you are given a statue plinth place in your player-owned house.

If you try to add the strange rock to the plinth for the very first time, Barnabus Hurma will stop you. Speak to him and you will show him the strange rock you have found; he will then say that you need to find its twin before you can add it to the plinth. With the update on 19 August 2010, Barnabus Hurma will give you a statue collection bag to store your strange rocks thus freeing up space in your bank or inventory

Strange rocks will not appear under a player's gravestone upon death.

When you are doing any skill and you receive the rock while your inventory is full, its message would be: "Something odd happens to the [X] and you are left with a strange rock." While [X] would be the item that was last made or obtained.

(Recent update puts construction strange rocks in your inventory when you train your construction skill.) Example- building in hotspots, or making flatpacks.

Rewards
After using a pair of strange rocks on the Statue plinth, the player gets $$y = x^2 - 2x + 100$$ where $$y$$ = Experience earned and $$x$$ = Skill level of the skill being trained when the rock is added to the statue. The player needs two rocks from each skill to complete the statue. When the player has collected two pieces in one skill, they can be added to the plinth in order to create a section of the Dahmaroc statue. The plinth is located in the Varrock Museum right next to the entrance. Once you complete the statue you get a replica plinth to put in your POH and you get a replica piece of statue to start the statue in your POH and you get to begin the search for pieces again which gives you a shot at the extra exp again.

You can use a Statue list to keep track which rocks you've added to the statue. You have to have two pieces to be able to add to the plinth.

Icons and Descriptions
You can identify what skill a strange rock is by examining it. Also, the different skills' rocks have different appearances. When trying to collect a strange rock by doing any of these, you will hear a small "thud" sound to say you now have a strange rock. ''Note: These are only the examine texts for the rocks themselves, not the only ways to obtain them. For methods of getting them, please check the Shattered Heart article.''

Equipment
Some equipment will be required to collect strange rocks. The equipment needed will be one's you need to train a certain skill. Some examples are a mining pickaxe for Mining and a hatchet for Woodcutting.

Useful Equipment:
You can talk to Barnabus Hurma, within Varrock Museum, to get your mitts on a Statue collection bag. These bags will automatically store any statue pieces you gain from a skill activity, and can be filled with your library of rocks. When you have two corresponding statue pieces in your bag, simply empty the bag and use the rocks on the statue base. You may also 'Look-in' the bag to check how many you have currently collected. If you lose or drop the statue collection bag, you will also lose its contents. This means that you'll have to complete skill tasks to regain the rocks you lost.

Trivia

 * If you have a Pet Rock in your inventory, a message is displayed showing its excitement when you receive a strange rock.Petrock.png
 * Strange rocks do not stack in your bank, even for the same skill.
 * Though extremely rare, it is possible to get two rocks right after one another while fletching, firemaking, crafting, mining, smithing, cooking, fishing, runecrafting, woodcutting, hunting or doing herblore or construction.
 * It is impossible to acquire a strange rock from the smithing skill by using the superheat item spell.
 * The only non-combat skills that you cannot acquire strange rocks from are Dungeoneering and Slayer because both skills involve some form of combat within the skill.
 * Oddly enough, you can get Farming strange rocks from dead plants.
 * There have been some instances where one is able to get two strange rocks from one event.
 * It is possible to obtain a strange rock while farming the plants in the Garden of Tranquillity quest.
 * It is possible to talk to the museum workers about the rock (for the first time) without having the rock in your inventory. The museum will talk in a way like you have given the rock and are examining it.
 * It is also possible to obtain a strange rock while cutting a tree from farming.