Sorry, I forgot completely about the RAWs. Here's the RAW for Mithril. It's super heavy but not sharp, making it good for blunt weapons, but terrible for edged weapons. Sorta the anti-Adamantine in that regard:
[INORGANIC:MITHRIL]
[USE_MATERIAL_TEMPLATE:METAL_TEMPLATE]
[STATE_NAME_ADJ:ALL_SOLID:mithril]
[STATE_NAME_ADJ:LIQUID:molten mithril]
[STATE_NAME_ADJ:GAS:boiling mithril]
[DISPLAY_COLOR:5:6:1]
[BUILD_COLOR:5:6:1]
[MATERIAL_VALUE:300]
[SPEC_HEAT:130]
[MELTING_POINT:25000]
[BOILING_POINT:50000]
[ITEMS_WEAPON][ITEMS_WEAPON_RANGED][ITEMS_AMMO][ITEMS_DIGGER][ITEMS_ARMOR][ITEMS_ANVIL]
[ITEMS_HARD]
[ITEMS_METAL]
[ITEMS_BARRED]
[ITEMS_SCALED]
[SOLID_DENSITY:50000]
[LIQUID_DENSITY:50000]
[MOLAR_MASS:50000]
[IMPACT_YIELD:5000000]
[IMPACT_FRACTURE:5000000]
[IMPACT_STRAIN_AT_YIELD:0]
[COMPRESSIVE_YIELD:5000000]
[COMPRESSIVE_FRACTURE:700000]
[COMPRESSIVE_STRAIN_AT_YIELD:0]
[TENSILE_YIELD:5000000]
[TENSILE_FRACTURE:5000000]
[TENSILE_STRAIN_AT_YIELD:0]
[TORSION_YIELD:5000000]
[TORSION_FRACTURE:5000000]
[TORSION_STRAIN_AT_YIELD:0]
[SHEAR_YIELD:50000]
[SHEAR_FRACTURE:100000]
[SHEAR_STRAIN_AT_YIELD:185]
[BENDING_YIELD:5000000]
[BENDING_FRACTURE:5000000]
[BENDING_STRAIN_AT_YIELD:0]
[MAX_EDGE:10000]
[STATE_COLOR:ALL_SOLID:LIGHT_MAGENTA]
Raw Mithril:
[INORGANIC:RAW_MITHRIL]
[ITEM_SYMBOL:'*']
[THREAD_METAL:MITHRIL:100]
[STATE_NAME_ADJ:ALL_SOLID:raw mithril]
[STATE_NAME_ADJ:LIQUID:molten raw mithril]
[STATE_NAME_ADJ:GAS:boiling raw mithril]
[DISPLAY_COLOR:5:6:1]
[TILE:156]
[MATERIAL_VALUE:250]
[SPEC_HEAT:7500]
[MELTING_POINT:25000]
[BOILING_POINT:50000]
[SOLID_DENSITY:50000]
[LIQUID_DENSITY:50000]
[MOLAR_MASS:55845]
[IMPACT_YIELD:2500000]
[IMPACT_FRACTURE:3000000]
[IMPACT_STRAIN_AT_YIELD:0]
[COMPRESSIVE_YIELD:2500000]
[COMPRESSIVE_FRACTURE:3000000]
[COMPRESSIVE_STRAIN_AT_YIELD:0]
[TENSILE_YIELD:2500000]
[TENSILE_FRACTURE:3000000]
[TENSILE_STRAIN_AT_YIELD:0]
[TORSION_YIELD:2500000]
[TORSION_FRACTURE:3000000]
[TORSION_STRAIN_AT_YIELD:0]
[SHEAR_YIELD:2500000]
[SHEAR_FRACTURE:3000000]
[SHEAR_STRAIN_AT_YIELD:0]
[BENDING_YIELD:2500000]
[BENDING_FRACTURE:3000000]
[BENDING_STRAIN_AT_YIELD:0]
[DEEP_SPECIAL]
[MAX_EDGE:1000] no swords until you can pick mats
[ITEMS_HARD]
[IS_STONE]
Raws for gibberlings will have to wait. They're much more complicated than metal/stone. If I haven't produced them by May, post a reply to this to send me a reminder.