Curse of Scotland Curse of Scotland The Curse of Scotland is a nickname used for the Nine of Diamonds playing card. The expression has been used at least since the early 18th century, and many putative explanations have been given for the origin of this nickname for the card. In a book printed in London in 1708, "The British Apollo, or, Curious amusements for the ingenious", a question is posed: Q. "Why is the" Nine of Diamonds "called" the curse of Scotland? A. Diamonds as the Ornamental Jewels of a Regnal Crown, imply no more in the above-nam'd Proverb than a mark of
Ten of diamonds decahedron Ten of diamonds decahedron In geometry, the ten-of-diamonds decahedron is a space-filling polyhedron with 10 faces, 2 opposite rhombi with orthogonal major axes, connected by 8 identical isosceles triangle faces. Michael Goldberg references it by the playing card name, "ten-of-diamonds", as a 10-faced polyhedron with two opposite rhombic (diamond-shaped) faces. He catalogued it in a 1982 paper as 10-II, the second in a list of 26 known space-filling decahedra. If the space-filling polyhedron is placed in a 3-D coordinate grid, the coordinates for the 8 vertices can be given as: (0, ±2, −1), (±2, 0, 1), (±1, 0, −1), (0,