Obsidian Tools Mod 1.8, 1.7.10, 1.7.2 adds Obsidian Tools, of which are better than diamond. This mod also adds an Obsidian Multitool.

A list of Obsidian Tools:

• Obsidian Sword: 8+ Attack Damage
• Obsidian Axe: 7+ Attack Damage
• Obsidian Pickaxe: 6+ Attack Damage
• Obsidian Shovel: 5+ Attack Damage
• Obsidian Hoe: 0+ Attack Damage