diff --git a/library/include/df/custom/inorganic_raw.methods.inc b/library/include/df/custom/inorganic_raw.methods.inc
new file mode 100644
index 000000000..3b324292a
--- /dev/null
+++ b/library/include/df/custom/inorganic_raw.methods.inc
@@ -0,0 +1,4 @@
+bool isOre()
+{
+    return flags.is_set(df::inorganic_flags::METAL_ORE) || flags.is_set(df::inorganic_flags::THREAD_METAL);
+}
\ No newline at end of file
diff --git a/library/include/df/custom/material.methods.inc b/library/include/df/custom/material.methods.inc
new file mode 100644
index 000000000..4dbc1753b
--- /dev/null
+++ b/library/include/df/custom/material.methods.inc
@@ -0,0 +1,8 @@
+bool isGem()
+{
+    return flags.is_set(df::material_flags::IS_GEM);
+}
+bool isStone()
+{
+    return flags.is_set(df::material_flags::IS_STONE);
+}