This is 1.47 ct. of sapphire. I have not been able to get the color in the photo to the deeper blue that is in the stone. Sapphire and ruby are both types of corundum which has a hardness of 9 on the mohs scale. I added this to my collection for a little over $700 dollars when there was extra cash about. Someday I would like to find a ruby. It probably comes out of mines in Northern Thailand or Myanmar. I keep it because it is shiny and in case I have to test the hardness of something. Then again, I might win the lottery and start commissioning jewelry to hand down to posterity.