Step 9: Admire the Finished Product
The oiled graphite will be broken. The others should largely be intact. You'll also find a small lump, slightly larger than a grain of sand where the oiled section was placed.
Congratulations! This is the product of your labors, a genuine diamond.
I took the raw diamond to a jeweler I know and had her test it. She confirmed that underneath the scale material, there's a tiny bit of diamond material. She said that its quality was pretty poor, but it did fluoresce like a "real" diamond.
Now, admittedly, this homemade synthetic diamond is too small and too filled with inclusions to make into jewelry. But, it technically qualifies as a diamond... and I made it, so that's pretty cool.