Bonemines are built into sandstone outcrops close to towns -- the sandstone layer is the easiest way to systematically reach buried bones so sandstone outcrops within the powdersand are the best locations for prospective mines.
Bonemines are laid out in the following way:
Bonemines Top Floor
The entrance is a big room that contains a Sunstation and an Onyxport. The Onyxport is connected to the Sunstation, and the Sunstation also has silver wires snaking off from it throughout the complex for lighting purposes.
Other rooms can appear depending on the size of the space -- a storage room is the first priority.
Storage rooms can contain Wheelmarrows, spare Kyanite, tools, etc. They can also be filled with Bonetainers of rock, sand or Britbones.
A Ledger Room contains chunks of Jade and the implements for working with it, as well as papers for copying of Jade information. This is an administrative area, albeit a somewhat disorganized one.
Ledger rooms can have Archrooms off them if there's space where people high in the mining hierarchy live. This isnt always the case though -- there isn't necessarily enough room on the top level.
Second Floor
Somewhere in the entrance is an Elevator that goes to the second floor. This elevator can hold wheelmarrows and other fixtures for transport as well as people and is managed via Kyanite pulleying.
The second floor is where all of the above is if the first floor isn't large enough Storage is again the priority. There is also:
Residential Caves -- a section of shared living spaces, dormitories and Archrooms organized in various ways for all of the members of the Mine's Guild. The number of rooms matches the number of NPCs. The content here is identical to other residential areas across the world which I'll detail elsewhere, except the format is connected and cavelike.
Water storage -- water is centralized on the second floor, held in Bonetainers.
Shaft Elevator -- a second elevator goes down into the actual mines.
Subsequent floors
Mines have a variable amount of floors, and Shaft Elevators on either side connect to all of them. Floors are hewn out from the rock in the form of tunnels going forwards which make grid patterns with additional tunnels. The layouts can be complex.
Also where the floor begins (with shaft elevators on either side), there may be additional storage rooms containing various items discussed above. These will definitely hold Kyanite Drills if they're not already out in one of the endpoints of the tunnels.
Kyanite Drills outside of the storage room (if any) will be at a terminal endpoint of one of the tunnels (forward, left or right basically). Pickaxes will also be scattered throughout, along with Wheelmarrows which may contain rock, sand or Britbones.
Britbones exist in the wall at various intervals. The ones that exist will have chunks of them missing, while squares of wall without any won't.
There will probably be a Deepbore machine at the bottom floor wherever the next shaft would be. It might also be currently digging through the rock here or it might be partially dug. They require kind of a lot of power, and creating more tunnels tends to make more sense rather than drilling deeper, unless Britbones are found in the floor in high quantity somewhere.
Meta
All floors have Sunstones coated by gold and connected by silver wires eventually up to the Sunstation for lighting.
Continuous Imports
Charged Kyanite (depleted kyanite + money is traded at kyanite charging stations).
Water
Drillbits (kyanite drills definitely break or wear out sometimes)
Pickaxes
Expansion Imports
Silver Wire
Wheelmarrows
Bonetainers
Bone elevator components
Bonechain (for the elevators)
Borebits (less of a priority since creating shafts isn't a common occurrence).
Exports
Britbone Chunks
Sandstone chunks and sand are also exported but they aren't useful so they're piled up in dump pits.
