Carat weight is very important but not without the color and clarity. If the piece is 10.00 carats but full of inclusions, it won’t have much hope of finishing to be a valuable diamond. Just as in polished diamonds, the clarity is critical in determining value. Some pieces of rough are termed glassies due to their very clear nature. The octahedral faces look like they’ve already been faceted. This is ideal for easy clarity grading with good light.