Gems are objects of wealth, icons of beauty, and emblems of the very best of everything. They are kept as signs of prestige or power. Given as tokens of love and affection, they also come in a kaleidoscopic array of hues and can be either mineral or organic. Gems can command a person s gaze in the way they play with light and express rich color. And they can evoke feelings of passion, greed, mystery, and warmth.
For millennia, gems have played an important role in human culture: they have significant value, both financially and within folklore and mythology. But just what "are" gems,...