What is the general term for clarity characteristics found within a diamond?

The term "inclusions" refers specifically to clarity characteristics found within a diamond. These are internal features that can include various materials, such as gas bubbles, other minerals, or even crystals, that were trapped inside the diamond as it formed. Inclusions can affect the clarity grade of a diamond, which is one of the key factors in determining its overall value and appeal. High-quality diamonds typically have fewer inclusions, making them more desirable.

The other terms mentioned would not apply accurately in this context. Blemishes, for instance, refer to external characteristics, such as scratches or nicks on the surface of the diamond. Flaws is a more general term often used to describe any imperfections, but it does not specifically categorize those found within the stone like inclusions do. Lastly, marks could refer broadly to any kind of imperfection, but again, it lacks the precise definition that "inclusions" provides, particularly in the context of internal characteristics.