The terms used describe the diamond exactly. The stone is faceted, and a hole drilled through it, so that it can be strung, as a bead.
Examples of faceted: The gemstone was a faceted diamond. The bone was multi-faceted.
A faceted diamond 'chip' can be used in jewelery.
A raw diamond is a mineral -- a stone -- mined from the earth from which cut and faceted gemstones (25%) and industrial diamonds (75%) are sourced.
Ideally, you'd replace a diamond with another diamond. Or if you wanted the empty space to look like the diamond was still there, you could replace it with an imitation diamond. You can replace a diamond with almost any faceted stone.
Diamond is the hardest known substance, but one diamond can scratch another diamond. If that was not the case, there would be no way for jewelers to shape diamonds as they do, into faceted jewels, instead of lumpy stones.
You could try a local jewelry store, shop online, or visit a gem show. Beads are incredibly popular today, and there are some enormous bead shows out there, so it shouldn't be hard to find what you're after.
The field test for a raw stone is 'extreme hardness'. A faceted and cut diamond can be verified by the use of a probe, which a jeweler can use to recognize a diamond.
A bizet is the upper faceted portion of a brilliant-cut diamond, which occupies the zone between the girdle and the table.
"The Golden Jubilee is the largest faceted diamond in the world, weighing 545.67 carats." It's colour grade is 'fancy yellow-brown'. This diamond is hard because diamond is the hardest mineral on earth.
According to Wikipedia: " ...cushion antique brilliant [cut] with a faceted girdle and extra facets on the pavilion."
There are two records for that: Centenary Diamond - world's largest colorless, flawless diamond and The Golden Jubilee Diamond - World's largest faceted diamond. These two are among the largest polished (finished) diamonds. The Cullinan diamond is the largest rough gem-quality ever found, at 3,106.75 carats.
Jewelers purchase faceted and polished diamonds from diamond brokers, depending on the quality of diamonds the jeweler wants for the jewelery it manufactures.