Runescape tips One: To get the ore immediately, as soon as you are about to hit the ore, click it again.
Runescape tips Two: To mine minerals faster, click on the rock you wish to mine then count how many times he hits the rock. After he hits the rock three times (in between three and four), click again on the rock you want to mine. If done correctly, he should start over twice, then you will instantly have the ore in your inventory.