A lab grown diamond's clarity refers to imperfections found on the surface or internally. Internal flaws are called inclusions, whilst external imperfections are referred to as blemishes. The majority of lab grown diamonds, both mined and Lab Grown, feature inclusions and blemishes on a microscopic scale, which is why even lab grown diamonds with the highest clarity grade feature slight inclusions. At ROCKRUSH, we reject 60% of all gem-grade lab grown diamonds, which is a level above the average. The minor inclusions featured in our Lab Grown Diamonds are entirely invisible to the naked eye.