I'm suggesting a new type of items: Ruby. They're mined from ore and the texture for ore is the same as old red emerald texture of 12w21a. The icon for ruby gem is same as first ruby texture.
The texture for ruby ore.
A wall of ruby ores.
What can ruby be used for? 9 of them can be crafted into Ruby Block. It's same as emerald block but it's red. Rubies can be used to craft tools and armor, which is between iron and diamond. Rubies mine faster than iron but slower than diamond. It can mine obsidian but takes a bit longer.
Rubies are rarer than lapis lazuli but less rare than diamonds.
There are a total of 7 ores already. Coal, Iron, Gold, Redstone, Lapis Lazuli, Diamond and Emerald. Let's make Ruby the 8th ore.
I like the idea of a ruby block and ore . not sure abou the tools. Probably not. The only reason I want the ore and block is because it' adds to the building aspect of minecraft just like how Redpower and mods that have more ores do.