Different rock types give different numbers of experience points, although the exact values are yet to be confirmed.
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Different rock types give different numbers of experience points. These values are known so far:
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{| class="wikitable"
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|-
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! scope="col"| Rock Type
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! scope="col"| Experience
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|-
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! scope="row"| The gray rocks that you find in the overworld
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| 1
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|-
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! scope="row"| The gray boulders that you find in the overworld
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| 0
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|-
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! scope="row"| The generic rocks that you find in the caves
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| 0
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|-
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! scope="row"| The gray rocks in caves that always drop stone
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| 4
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|-
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! scope="row"| Topaz node
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| 8
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|-
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! scope="row"| Amethyst node
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| 10
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|-
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! scope="row"| Aquamarine node
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| 18
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|-
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! scope="row"| Jade node
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| 20
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|-
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! scope="row"| Emerald node
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| 50
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|-
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! scope="row"| Ruby node
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| 80
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|-
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! scope="row"| Diamond node
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| 100
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|-
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! scope="row"| Generic gem node
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| 0
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|}
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You also get a bonus when busting generic rocks if the rock drops something other than basic stone. Coal gives you a +5 bonus, and random gems probably award points as well. It's hard to measure these bonuses since they can't be gathered in a predictable manner.
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You are awarded points when the rocks are destroyed. It doesn't matter if this is done by your pick, a bomb, or by the action of a monster.