Hi,
mineral spirits aren't really needed ,
unless you rubbed wax/sap into your diamonds,
they don't get you anything
for cleaning diamond plates/stones, dry cleaning,
- use a pencil eraser, the metal dust mostly sticks to the eraser shavings,
- or a soft brush like a toothbrush outdoors , metal dust can float do do it outdoors

- you can also use a dry towel , the metal dust that comes off the stone mostly sticks to the towel fibers, towel fibers might stick to hone, brush them off
for cleaning diamond plates/stones, wet cleaning,
- soap and water and scrub with toothbrush, rinse
- wipe with damp cloth (towel, sock ...), dampened with water, soapy water, isopropyl...
- when finished pat dry and leave to DRY before putting away/reassembling