Index: ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_serfs.json
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_serfs.json
+++ ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_serfs.json
@@ -5,8 +5,8 @@
 	},
 	"description": "Compel serfs to help your workers quarry stone. Increases stone gathering rates.",
 	"cost": {
-		"wood": 400,
-		"metal": 200
+		"food": 400,
+		"stone": 200
 	},
 	"supersedes": "gather_mining_servants",
 	"requirements": { "tech": "phase_town" },
Index: ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_servants.json
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_servants.json
+++ ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_servants.json
@@ -9,8 +9,8 @@
 	},
 	"description": "Hire servants to help quarry stone. Increases stone gathering rates.",
 	"cost": {
-		"wood": 200,
-		"metal": 100
+		"food": 200,
+		"stone": 100
 	},
 	"requirements": { "tech": "phase_village" },
 	"icon": "mining_stone_01.png",
Index: ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_shaftmining.json
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_shaftmining.json
+++ ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_shaftmining.json
@@ -2,8 +2,8 @@
 	"genericName": "Shaft Mining",
 	"description": "Develop shaft mining. Increases metal gathering rates.",
 	"cost": {
-		"wood": 400,
-		"metal": 200
+		"food": 400,
+		"stone": 200
 	},
 	"supersedes": "gather_mining_wedgemallet",
 	"requirements": { "tech": "phase_town" },
Index: ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_silvermining.json
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_silvermining.json
+++ ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_silvermining.json
@@ -6,8 +6,8 @@
 	},
 	"description": "Strike a vein of precious silver. Increases metal gathering rates.",
 	"cost": {
-		"wood": 600,
-		"metal": 300
+		"food": 600,
+		"stone": 300
 	},
 	"supersedes": "gather_mining_shaftmining",
 	"requirements": { "tech": "phase_city" },
Index: ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_slaves.json
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_slaves.json
+++ ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_slaves.json
@@ -10,8 +10,8 @@
 	},
 	"description": "Buy slaves to help your workers quarry stone. Increases stone gathering rates.",
 	"cost": {
-		"wood": 600,
-		"metal": 300
+		"food": 600,
+		"stone": 300
 	},
 	"supersedes": "gather_mining_serfs",
 	"requirements": { "tech": "phase_city" },
Index: ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_wedgemallet.json
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_wedgemallet.json
+++ ps/trunk/binaries/data/mods/public/simulation/data/technologies/gather_mining_wedgemallet.json
@@ -2,8 +2,8 @@
 	"genericName": "Wedge and Mallet",
 	"description": "Equip your workers with helpful tools. Increases metal gathering rates.",
 	"cost": {
-		"wood": 200,
-		"metal": 100
+		"food": 200,
+		"stone": 100
 	},
 	"requirements": { "tech": "phase_village" },
 	"icon": "mining_metal_01.png",