What does SI -1 clarity for a diamond mean?

SI-1 clarity in a diamond indicates that the stone has "Slightly Included" characteristics, meaning it contains inclusions that are visible under 10x magnification but are typically not noticeable to the naked eye. These inclusions may affect the diamond's overall appearance and value, but they are generally minor. SI-1 diamonds can still present a good balance of quality and affordability, making them a popular choice for many buyers.