[Daigoro]

Answer 9b) More Calledronite Trade
I was thinking that calledronite's self-attracting property should be useful somehow, then I realised:

Calledronite Compasses and Markers
A compass with a needle tipped with calledronite will point to large or nearby amounts of the gemstone. Obviously such compasses are useless in Fragment, and there will be interference from any calledronite items carried by a travelling party, but they can be useful in many realms and dimensions that travellers pass through. Calledronite marker stones can be placed next to portals to allow wayfarers to find them and navigate toward them from large distances away, especially in realms with unfriendly environments. Markers could also be placed next to travellers' huts or other places of interest, or they might be used by bandits to create an ambush.