Add synthetic diamonds into Minecraft.

I want the ability to build artificial diamonds in Minecraft but make the durability slightly worse and make the weapons and armour have 75% of the regular diamonds durability. So, it makes easier for people to make decent armour, but doesn't make natural diamonds obsolete. I think the way they should be made is by putting coal into a blast furnace and combining lava, and it should take half a Minecraft day to make one diamond.