Likely back in terms of the 1500s, retailers utilized many different and inconsistent conditions to mention the four elements of the diamond’s worth. “Without flaws” or “with imperfections” were employed to explain clarity; “tincture” or “tint” to describe shade; and terms including “make properly” or “designed inadequately” to describe Slash. https://www.gemsbiz.com/blog/explore/a-guide-on-diamond-quality-grading-parameters