Corundum Ore

Corundum Ore is a rare ore found between Bedrock and level 64 in the Overworld. Harvesting it with an Diamond Pickaxe or better drops Sapphires (75% Chance). with a 20% chance to drop 2 Gems and an 80% chance to drop 1 Gem, or Rubies (25% Chance) with a 20% chance to drop 2 Gems and an 80% chance to drop 1 Gem,