Diamond push-ups

Guys i just wanna ask one question from all of you what are Diamond push-ups ..?? somewhere i have read the name of it but don't really know how to do these push-ups.. can you please tell me about it..???

[Mosey]

You put yer hands close together with the fingertips touching. Now when you do a pushup your arms will make a diamond shape. It's rather hard to perform a diamond pushup but it will toughen ya up, fer sure!

[MikeVJ]

Place your hands on the floor with your index fingers touching and your thumbs touching (each other). See the diamond?

Now do pushups where your chest touches the diamond.

Diamond pushups target the triceps more than your pectorals.