Index: gems.lua
==================================================================
--- gems.lua
+++ gems.lua
@@ -55,11 +55,11 @@
 	end
 	gem.durability = gem.durability or (gem.hardness or 1) * 100
 	if not gem.foreign_amulet then
 		local img = sorcery.lib.image
 		local colorized_stone = function(file)
-			return img(file):multiply(sorcery.lib.color(gem.tone:brighten(1.1)))
+			return img(file):multiply(sorcery.lib.color(gem.tone):brighten(1.1))
 		end
 		local img_stone = colorized_stone('sorcery_amulet.png')
 		local img_stone_tiny = colorized_stone('sorcery_amulet_embedded.png')
 		local img_sparkle = img('sorcery_amulet_sparkle.png')
 		local img_necklace = img('sorcery_amulet_necklace.png')