A two-trait Punnett Square has 16 boxes. The probability of a cross producing a genotype in any box is 1 in 16. If the same genotype is present in two boxes, its probability of occurring doubles to 1/8 (1/16 + 1/16).
November born individuals, are blessed with two ruling Birthstones, the revered Topaz and the gentle, healing Citrine. Topaz is a gemstone exhibiting an array of spectacular colors. The stone was believed to be symbolic of the Egyptian Sun God Ra, with its brilliant golden glow and fiery intensity.
Lapis Lazuli is listed as the traditional birthstone for December. (Note that the official birthstone list adopted by the American National Association of Jewelers in 1912 denotes Turquoise and blue Topaz as the official birthstones.) It is also the Planetary stone for Capricorn and the birthstone for Libra. See the birthstone tables for additional references to lapis.