Precious Stone Optical Special Effects
Gemstones’ special effects are the either natural – called “phenomena” by gemologists – or created by the special cutting and shaping techniques. These special techniques add brilliance to the defiance of the stone itself and give optical impression. Below there is a list of popular gemstone effects that are often used for [...]
Did you know?
There are 14 officially recognized varieties of tourmaline.
Tourmaline can have different colors from black, green, pink, yellow, light blue, dark blue, and colorless. Some crystals of tourmaline can contain more colors.
The most famous type of multiple coloration is the watermelon tourmaline; it typically changes from red to green in a concentric color zonation, [...]
Continue reading about The other October Birthstone: Tourmaline
