diff --git a/nalc_default/nodes.lua b/nalc_default/nodes.lua
index 5e6e17a..d5e37d8 100644
--- a/nalc_default/nodes.lua
+++ b/nalc_default/nodes.lua
@@ -38,7 +38,7 @@ minetest.register_node(
 		description = "Copper Ore",
 		tiles = {"default_desert_stone.png^default_mineral_copper.png"},
 		is_ground_content = true,
-		groups = {crumbly = 1, cracky = 3},
+		groups = {cracky = 2},
 		drop = {
 			items = {
 				{items = {"default:copper_lump"}},
@@ -53,7 +53,7 @@ minetest.register_node(
 		description = "Tin Ore",
 		tiles = {"default_desert_stone.png^default_mineral_tin.png"},
 		is_ground_content = true,
-		groups = {crumbly = 1, cracky = 3},
+		groups = {cracky = 2},
 		drop = {
 			items = {
 				{items = {"default:tin_lump"}},
diff --git a/nalc_moreores/init.lua b/nalc_moreores/init.lua
index ba854b9..055e558 100644
--- a/nalc_moreores/init.lua
+++ b/nalc_moreores/init.lua
@@ -18,7 +18,7 @@ minetest.register_node(
 		description = "Silver Ore",
 		tiles = {"default_desert_stone.png^moreores_mineral_silver.png"},
 		is_ground_content = true,
-		groups = {crumbly = 1, cracky = 3},
+		groups = {cracky = 2},
 		drop = {
 			items = {
 				{items = {"moreores:silver_lump"}},