Goldstone is a man-made stone produced from glass filled with crystallised copper.
The brownish-orange colour is more common than blue, but blue goldstone is more popular.
Cobalt instead of copper tends to be used in blue goldstone.
Blue goldstone twinkles in ambient light due to the reflection of light off the metallic inclusions.
The story about goldstone being created by Italian monks in Venice is a myth.
The majority of goldstone is produced in China.
GARNET
