code/modules/mining/boulder_processing/boulder_types.dm 
| /obj/item/boulder/artifact | Boulders with special artificats that can give higher mining points |
|---|---|
| /obj/item/boulder/gulag | Boulders usually spawned in lavaland labour camp area |
| /obj/item/boulder/gulag_expanded | Boulders usually spawned in lavaland labour camp area but with bluespace material |
| /obj/item/boulder/shabby | lowgrade boulder, most commonly spawned |