gemstone spires biome

relatively flat biome of all stone with occasional 8x16x8 spires of diamonds, emeralds, and gold. these spires appear roughly 1 out of every 4 chunks, but with some larger variants. creepers will also naturally and more commonly in this area. but beware, because 1 out of every 8 spires or so contain a stone guardian.
a stone guardian is a hostile hulking creature resembling stone with diamond ore fists and other random ores assorted across its body with roughly 100 hp. 
drops when killed:
  diamonds (2-4)
  stone (5-10)
  cobblestone (2-4)
  emeralds (0-2)
  raw iron (3-7)
there is also a deepslate variant to this biome with a deeplslate guardian. there is also coal, and iron strewn across the floor. there is also another new mob called stone/deepslate sentry. they resemble just a singular block of stone with stronger level 2 of iron, and level 3 diamond. these sentries are typically neutral unless you break one of their block type will they attack. these blocks slide around and can jump one block they are relatively the speed of a spider. they can be killed with a pickaxe that can break and drop their block type (less hits if its a stronger pickaxe), and they drop the type of block or ore that they are. the stone sentries do 4 damage, the iron sentries do 6, and the diamond sentries do 10. there is also a rare emerald variant which has the same stats as iron but is 1.5 times faster.