SI1 clarity refers to a specific clarity grade assigned to Moissanites. Clarity is one of the four Cs (Cut, Color, Clarity, Carat weight) used to assess the quality and value of a Moissanite. SI1 stands for "Slightly Included 1," which means that there are slight inclusions visible under 10x magnification. However, these inclusions are generally not visible to the naked eye.

SI1 clarity Moissanites offer a good balance between clarity and value. While there may be some inclusions present, they do not significantly affect the overall beauty and brilliance of the Moissanite. In fact, with proper selection, an SI1 clarity Moissanite can appear eye-clean, meaning that the inclusions are not visible without magnification.

The specific location, type, and size of the inclusions within an SI1 clarity Moissanite can vary, so it's always recommended to view the Moissanite in person or review detailed images to assess its appearance and visual impact. Additionally, the cut, color, and carat weight of a Moissanite should also be considered when evaluating its overall quality and value.