A diamond inclusion refers to a natural internal imperfection formed during the diamond’s crystallization process. These tiny flaws, like internal birthmarks, can vary in size, shape, and visibility. While some inclusions are microscopic and don’t affect the diamond’s appearance, others may impact its brilliance or durability. Understanding the different types of inclusions can help you make an informed purchase.
1. Feathers
Feathers are small cracks or fractures inside the diamond. These can vary in visibility depending on their size and location. While tiny feathers often go unnoticed, larger ones may affect the diamond’s durability.
2. Clouds
Clouds are clusters of very tiny inclusions that can appear as hazy or milky patches within the diamond. They can affect the diamond’s sparkle if concentrated, but small, scattered clouds are often invisible to the naked eye.
3. Crystals
Crystal inclusions are mineral crystals trapped within the diamond. These may appear in various colors or even colorless, depending on the type of mineral. While clear crystals might blend in, darker ones, like black carbon spots, can be more noticeable.
4. Pinpoints
Pinpoints are extremely small dots within the diamond. These are often invisible without magnification and typically don’t impact a diamond’s appearance unless found in clusters, forming a “cloud.”
5. Needles
Needles are long, thin inclusions that resemble tiny threads. Depending on their position and concentration, needles can be invisible to the naked eye or may create a faint line.
6. Knots
Knots are crystal inclusions that extend to the diamond’s surface, creating raised areas on the diamond. They can be seen under magnification and can sometimes affect the smoothness of the diamond’s surface.
7. Twinning Wisps
Twinning wisps are a result of the diamond’s growth irregularities. They often appear as twisted, ribbon-like inclusions and are usually seen in fancy-shaped diamonds. Twinning wisps can have minimal impact on clarity when dispersed.
8. Cavities
Cavities are openings or holes on the diamond’s surface where an internal crystal may have been removed during the cutting process. Large cavities may collect dirt, affecting the diamond’s sparkle.
Understanding these inclusions can help you make an informed decision when buying a diamond. Always review the diamond’s grading report and inspect the stone to ensure the inclusions don’t detract from its overall beauty or durability.
