Gems

Gems, currently just rubies, sapphires, and emeralds, are added by RedPower. With the exception of Emeralds, which can be used to make the Sonic Screwdriver, the only use for them is to make tools with the speed of diamond tools but a durability of just 500. They cannot be crafted into armor. An iron pickaxe or better is required to mine gems.

Each gem is worth 1024 EMC.

The Tekkit Emerald is not the same as the vanilla Emerald and cannot be used to trade with villagers in 1.3.2.



Tools
Each of these are made with the same pattern as the the vanilla versions, but using gems rather than wood, stone, iron, or diamond. Sickles and handsaws can also be created using gems.

Gem blocks
Ruby Block

Emerald Block

Sapphire Block

Other
Sonic Screwdriver