Recursive plugin loading.

data/plugins/skill/mining/gem.rb

@@ -0,0 +1,19 @@
+GEMSTONES = {}
+
+class Gemstone
+  attr_reader :id, :chance
+
+  def initialize(id, chance)
+    @id = id
+    @chance = chance
+  end
+end
+
+def append_gem(gem)
+  GEMSTONES[gem.id] = gem
+end
+
+append_gem(Gemstone.new(1623, 0)) # uncut sapphire
+append_gem(Gemstone.new(1605, 0)) # uncut emerald
+append_gem(Gemstone.new(1619, 0)) # uncut ruby
+append_gem(Gemstone.new(1617, 0)) # uncut diamond