電氣石

Blue-Green Jade – Tourmaline

Tourmaline is renowned for its wide range of colors, with its name derived from the Sinhalese word “TURMALI.” Tourmaline crystals possess both piezoelectric and pyroelectric properties, generating electrical charges when subjected to pressure or heat. Among the various colors, blue or blue-green tourmalines are the most valuable, followed by red, while chrome tourmaline with a bright green color also holds high value. The rarest and most valuable is Paraiba tourmaline. When selecting tourmaline, the 4C principles (color, clarity, cut, and carat) play a key role in determining its price. Cat’s eye tourmaline is a rare phenomenon. High clarity and well-cut stones are more valuable.