Artificial gem penetrator armour piercing bullet

Artificial gem penetrator armour piercing bullet.

The artificial gem should at least score 9 on the mohs scale of hardness.

Design: 1
A copper jacket, lead seal, mild steel cup, the artificial gem penetrator and more.
2
Paint an external coating a steel jacket a lead alloy and then the artificially gem penetrator.


To find out:
How good they work.
How good they work compared to tungsten carbide.
 Also extra: The weight difference compared to tungsten carbide with the same                    measurements.
What the cost is and if its worth it.


Update:
 Problem; they might shatter


By JK in 2016