In the interest of improving mining for everybody I'll tell you all everything I know or believe to be true about it...
Known
A Prospectors Only: Yield more fragments per rock.
D2 Mining Lasers Only: They cut 3.5X as efficient at D1, Only require 2X the power of D1.
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Not all Pristine Metallic Rings are Equal!: Some Pristine Metallics have higher concentrations of metals than others.
Good ships to mine in order: Fed Corvette, T9, Anaconda, Python, Asp Explorer, T6 (Until you can get an ASP Explorer!), Cobra.
Dropping into a HAZ/HIGH RES, move away about 10-20KM from action, and mine usually no AI show up after the initial entry. If you mine the rings without a RES, AI show up when you first come in now to pester.
Proof:
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Believe to be True
All Rocks are the same inside a ring, in terms of fragments and % chance to find a particular metal in them.
Likely other types of rings all have varying levels of materials as well, not just Pristine Metallic.
+1 rep sir, that is an amazing amount of work and information, thanks for sharing! I did cash in last night, 192t of 3p + gold and a bit of Osmium (was hoping for some mission opportunities, but no luck). Cashed in a total of about $6M (did manage 2 mission specific opportunities for about $500k). It used to be I could count on the 3P + Osmium for some missions, but this seems to have changed with 2.1, with all of the new materials they ask for just about anything which pretty much nerfs that idea.[blah]
My Clipper works well in a non res metallic ring, but like you say, pirates show up EVERY SINGLE TIME. I just outrun them.
Thinking about doing some missions, haven't tried those in 2.1 yet as I've been traveling and just wrapping up this last mining trip. I'll PM you for a site recommendation, I've been going to the same mining spot for quite a while, might be good to mix it up a bit if it's not too far, thanks![yesnod]