Chisel is a MOD for Minecraft which features a complete collection of blocks that are accessed, as you might have guessed, through the chisel tool.
Craft this new tool with a stick and an iron ingot
To craft your chisel all you need is an iron ingot and a stick. Once you have crafted the chisel you will be able to access a collection of decorative blocks which are mostly only available when you use the chisel tool. This is a mainly decorative MOD which will allow you to use exclusive block designs which can then be used in the constuction of your buildings.
The MOD also features an Ender Offset Wand tool which can be used for textures that span several blocks and can be moved up, down, to the right and to the left.
This is yet another extension for Minecraft that can be installed using Forge, which has proved so useful in expanding the already expansive options offered in this game in terms of creativity.