Here's a guide to January's stone, including its namesake, history and more. Garnet is January's birthstone. Its name derives from the medieval Latin "granatus," meaning "pomegranate," according ...

The 2.51 ct stone was a rare cat’s-eye demantoid (figure 1). Demantoid garnet is by definition the green-colored andradite caused by chromium substitution. Chatoyancy is usually caused by closely ...