Not the end of this guide, but you just need to be in the end to gather any reasonable quantity of iridium metal, so go there with your new brush.
#### Step 3: Mine end stone or any kind of purpur
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MINE the block, as in break it like you're using a pickaxe, and it should puff into a bit of black smoke and drop no items. This means it's working right, and you've officially rolled for a chance to drop an iridium fragment. All purpur blocks have a 1/100 chance to drop a fragment, and end stone has a 1/1000 chance.
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MINE the block, as in break it like you're using a pickaxe, and it should drop no items (does not have to be naturally generated, you can craft purpur and place it and mine it with brush for this. This means it's working right, and you've officially rolled for a chance to drop an iridium fragment. All purpur blocks have a 1/100 chance to drop a fragment, and end stone has a 1/1000 chance.
#### Step 4: Keep mining
This may take a bit of time, continue on to step 5 when you've dropped your first fragment.