What a ruby looks like.
Rubies are one of the three gemstones in redpower world. They can be used to make tools that mine as fast as diamond tools and have a durability of five hundred, making them an effective substitute for diamond tools. However, they cannot mine obsidian.
Like the other gemstones, rubies can be transmuted with Equilivant Exchange, and are worth 1003 EMC each, equal to 1/8 of a diamond.