This is a cool, unique, and actually collectible to a degree. GIA won't be grading Lab Diamonds soon. This stone, at SI1, has a tiny carbon spot deep inside. No way you could see it with the naked eye, but you know it's there - your little secret. Colorless Diamond as well. The cut is also a unique aspect. It's an oval, but behaves a bit like an emerald cut. Lots of large fiery. Nice size too!