gem and crystal textures, other texture fixes

metals.lua

@@ -84,14 +84,14 @@ end
 if check_aliases("potions:lead_lump", {"default:lead_lump"}) then
 	minetest.register_craftitem("potions:lead_lump", {
 		description = "lead Lump",
-		inventory_image = "default_steel_lump^[colorize:black:30",
+		inventory_image = "default_iron_lump^[colorize:black:30",
 	})
 end
 
 if check_aliases("potions:lead_block", {"default:leadblock"}) then
 	minetest.register_craftitem("potions:lead_block", {
 		description = "Lead Block",
-		inventory_image = "default_steelblock.png^[colorize:black:30",
+		inventory_image = "default_steel_block.png^[colorize:black:30",
 	})
 	
 	minetest.register_craft({

structures/bridge.lua

@@ -58,7 +58,7 @@ function make_temp_node(oname)
 		description = odef.name,
 		tiles = odef.tiles,
 		special_tiles = odef.special_tiles,
-		groups = {cracky=3, crumbly=3, snappy=3, choppy=3},
+		groups = {cracky=3, crumbly=3, snappy=3, choppy=3, not_in_creative_inventory=1},
 		drawtype = "nodebox",
 		paramtype = "light",
 		paramtype2 = "facedir",