Cloud

In jewelry, 'Cloud' denotes an inclusion within a gemstone that affects its clarity and appearance.

Part of speech: noun
Definition: Within the context of gemology, the term 'Cloud' refers to a cluster of tiny inclusions or internal 'cracks' within a gemstone, often too small to be distinguished individually with the naked eye. These clouds can scatter light passing through the gem, affecting its brilliance and overall appearance. While they can detract from the gem's value, especially in diamonds, some clouds can contribute to the uniqueness and character of certain stones, offering a distinctive beauty. Cloud inclusions are a critical factor in the gemstone grading process and are meticulously evaluated in laboratory settings to determine the stone's clarity grade.