It's definitely rust. Please stop suggesting it's blood... I would never...
This listing is for an oversized d20 (27mm) with the Interstellar Dice logo on the 20 face.
Please be aware these dice are handmade and therefore may have micro scratches, mold marks, or small nicks. Any notable flaws will be listed below.
Notable flaws: there may small distortions in numbers caused the gears