Something I have not read in any guides, is 'venting'.
Once you become familiar with HOW to mine, you'll want to know WHAT to mine.
Depending on the number of BINS you have in your Refinery, you'll want to focus on specific resources as you might find a more valuable resource but in lesser quantity.
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Resource "chunks" can contain two (or more? I've only seen two so far) resource types, you need to specify the type you want to harvest. As long as you have a type in a bin, it will automatically "consume" the hopper-resource, until the BIN reaches 100% (and completes 1ton of that resource).
When you find a RARE or more valuable resource, such as Gold, Platinum, etc, you might want to hold on to it, thus locking away a BIN from accumulating.
** Note - I've found that if you have sufficient cargo-capacity (10+), it's faster to collect the more readily available resources as you can find 4x the Gallite as you would Silver, and Gallite at ~2100CR vs time spent hunting silver at ~5k-5500 - you'll earn far more, and faster.
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SO! You'll collect a sample into the hopper; If the resource is NOT something you have BIN space for, or want to collect due to CARGO space, just harvest the amount (again, by specifying via HOPPER confirmation - and select to "vent" the remaining sample.
Ex: Gallite 15%, Lepidolite 2% - the Lep. is hardly worth the effort when compared to Gallite and BIN space is limited.
This will require more work because you have to do this each time you collect a sample, however, it's the only way to allow you to continue if you're limited on BIN space or CARGO space.
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** Note - You can use this as a comparative index of their value:
(you can look up the actual resource elsewhere for precise values)
** Note - I seem to find a mix of all kinds in various quantities - so keeping the more valuable types in the BIN and venting lower-values from the hopper speeds things along.
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Platinum 19.7k
Paladium 14.250k
Gold 9.7k
Beryllium 8.69k
Silver 4.873k
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Bertrandite 2926
Indite 2619
Gallite 2140
Coltan 1696
Uraninite 1168
Lepidolite 812
Rutile 406
Boxite 300
**Edit - when "scooping up" resources, I use my thrust forward, and thrust reverse often. I may shoot off 3-4 pieces which will float to approximately an equal space, so I thrust forward, then back again, and keep 'pecking' at them. It's much faster than doing fly-by's.
** Note - other players and NPC's will "steal" your hauls if left floating. Conversely, I haven't yet run into a problem where taking a chunk mined by an NPC offended them.
** Note - When scooting between asteroids, I choose to switch to engine/shields or full engine, then switch to full weapons when mining. It allows for faster transit while leaving the scoop down and weapons open.
** Note - one last thing - You will be scanned by NPC's (and likely players). If you get scanned by anything other than Security Forces, and if you have any cargo, you'll be put into a fight or flight confrontation - NPC's will say "I only want all that you have", and then open fire on you.