What is India Stone?
The man-made abrasive aluminum oxides are called as India Stones and it is the trade name which makes it a lot more common than the scientific name. There is no doubt in the fact that the Norton's Aluminum oxide is hard to remember and a less impressive name for India Sharpening stones. Due to this reason, you can’t find people who know the alternative name of this stone.
These are used to sharpen metal objects or such other hard objects by rubbing it on an angle and these are very common in the hardware industry. Most of the carpenters use these to sharpen their tools. You can find these in three major colors which are Orange, Brown and the last one is Tan. Stones with different colors can't be India stones