The emerald cut is directly inspired by the green gemstone of the same name. It has an elongated shape that focuses on the clarity of the diamond, meaning that with an emerald cut, sparkle is not going to be the biggest feature.
Diamond clarity is the assessment of small imperfections on the surface and within the stone. Surface flaws are called blemishes, while internal defects are known as inclusions. In most cases, a diamond’s beauty is not affected by these since most inclusions can’t be seen with the naked eye. When referring to inclusions, gemologists often use the term “internal characteristics” instead of flaws.