To celebrate spring, we’re starting a new series with a gem of the month beginning with pink diamonds. My personal favorite gem stone is very rare, and even a bit mysterious. Perhaps as a gem mystery/fantasy author, that’s why I like it so much. I first saw the gem while I was in school to become a Graduate Gemologist in San Diego at the Gemological Institute of America. One afternoon, after a long day of studying in the lab, a rather sterile room filled with lots of microscopes and white desks, our instructor had us gather around. A famous jeweler…