From MacKenzie:

"Gemstones can be prong set or bezeled prong settings reveal the stone from the top and sides. Some settings are more fragile but show off the gem. Heavier prongs are sturdier but cover more of the gem. A bezel set (or wall aromel the stone) is the strongest. It can take lots of hard wear and tear. Again, I can set your stone or we can find the perfect stone for your design. I quote as we talk so you know about the final cost."