14k two tone navette ring with green chrysoprase and old mine cut diamond sz 4.75

I was so excited to find this one! Usually, rings like these are black onyx, but this one is chrysoprase with a lovely old cut diamond set in the center of it. It is all set in 14k white and yellow gold. (Green onyx is dyed green chalcedony whereas chrysoprase is naturally colored. Based on testing with a spectroscope & color filter, I do not believe this is dyed.)

The diamond measures approximately 4mm so around 0.24ct. The ring is a size 4.75.