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diff --git a/settingtypes.txt b/settingtypes.txt
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--- a/settingtypes.txt
+++ b/settingtypes.txt
@@ -2,4 +2,4 @@
 # 1.0 is according to the mapgen generator 
 # 2.0 means half as many ores as result
 # 0.5 means twice as many ores as result
-gravelsieve_ore_rarity (Rarity factor to find ores) float 1.0
\ No newline at end of file
+gravelsieve_ore_rarity (Rarity factor to find ores) float 0.5
\ No newline at end of file