Material.zs :
import com.acronym.base.IMaterialType;

var osmium = mods.base.Materials.getOrRegister("osmium", 20, 9090A3, false);

osmium.registerNugget();
osmium.registerIngot();
osmium.registerDust();
osmium.registerGear();
osmium.registerPlate();
osmium.registerOre(3, 15, "pickaxe", 3);
osmium.registerPoorOre(3, 15, "pickaxe", 3);
osmium.registerBlock(5, 30, "pickaxe", 3);

But showing when i do a research

Should be fixed both for V1 and V2 of the Material System