Gems are an oddity of nature. Throughout the
ages humans have attributed special significance to gems and the jewelry
they made from them. Charms made from gems, were thought to prevent evil
from entering your body. Every month has a birthstone to provide good
luck to its wearer. Beads, necklaces, earrings, and bracelets were all
created to display gemstones.
Today gems are pretty to look at and are durable,
but humans place the value on them depending on the fashion of the time.
For example, in Renaissance times, green turquoise was greatly admired
and cost more than other varieties. Today the blue turquoise is
fashionable and has more value. In ancient Greece, only blue gems were
valued, while in ancient Rome, green gems were prized.