diff -Naur df_31_13_vanilla/raw/objects/inorganic_stone_mineral.txt df_linux/raw/objects/inorganic_stone_mineral.txt
--- df_31_13_vanilla/raw/objects/inorganic_stone_mineral.txt	2010-09-15 05:44:53.000000000 -0600
+++ df_linux/raw/objects/inorganic_stone_mineral.txt	2010-09-23 08:35:46.000000000 -0600
@@ -708,23 +708,23 @@
 [SOLID_DENSITY:200]
 [LIQUID_DENSITY:2600]
 [MOLAR_MASS:55845]
-[IMPACT_YIELD:5000000]
-[IMPACT_FRACTURE:5000000]
+[IMPACT_YIELD:2500000]
+[IMPACT_FRACTURE:3000000]
 [IMPACT_STRAIN_AT_YIELD:0]
-[COMPRESSIVE_YIELD:5000000]
-[COMPRESSIVE_FRACTURE:5000000]
+[COMPRESSIVE_YIELD:2500000]
+[COMPRESSIVE_FRACTURE:3000000]
 [COMPRESSIVE_STRAIN_AT_YIELD:0]
-[TENSILE_YIELD:5000000]
-[TENSILE_FRACTURE:5000000]
+[TENSILE_YIELD:2500000]
+[TENSILE_FRACTURE:3000000]
 [TENSILE_STRAIN_AT_YIELD:0]
-[TORSION_YIELD:5000000]
-[TORSION_FRACTURE:5000000]
+[TORSION_YIELD:2500000]
+[TORSION_FRACTURE:3000000]
 [TORSION_STRAIN_AT_YIELD:0]
-[SHEAR_YIELD:5000000]
-[SHEAR_FRACTURE:5000000]
+[SHEAR_YIELD:2500000]
+[SHEAR_FRACTURE:3000000]
 [SHEAR_STRAIN_AT_YIELD:0]
-[BENDING_YIELD:5000000]
-[BENDING_FRACTURE:5000000]
+[BENDING_YIELD:2500000]
+[BENDING_FRACTURE:3000000]
 [BENDING_STRAIN_AT_YIELD:0]
 [DEEP_SPECIAL]
 [MAX_EDGE:1000] no swords until you can pick mats
@@ -758,4 +758,4 @@
 [MAX_EDGE:1000] no swords until you can pick mats
 [ITEMS_HARD]
 [IS_STONE]
-*******************
\ No newline at end of file
+[UNDIGGABLE]
\ No newline at end of file