Asterism: Star Gemstones

Asterism

Some of the most interesting members of the gem kingdom are those reflecting bright bands of light that form stars. This optical phenomenon is known as "Asterism". The term "Asterism" comes from the Greek word "aster", which means … [Read more...]

Chatoyancy: Cat’s Eye Effect

cats eye thumb

Chatoyancy is an optical phenomenon in which a band of reflected light, known as a “cat’s eye,” moves just beneath the surface of a dome-shape cut gemstone. The name "chatoyance" originates from the French word "chatoyer," which means … [Read more...]