Aloha! Yes. Yes we have. Black carbon flecks that are eye-visible in a natural Diamond resemble flecks of ground black pepper. Following is an example of a Marquise Cut "Salt And Pepper" Diamond. The clearness or whiteness of the Diamond would be the "salt." So a Salt and Pepper Diamond is a way of saying the Diamond is included by black carbon spots/flecks. These are usually very low-grade diamonds, typically having a clarity rating of I-3 (very heavily included). Mahalo for the question. We don't sell such Diamonds so we don't often hear that term.
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