

This site uses cookies to give you the best, most relevant experience. Using this website means you're OK with this
Product Details | |
---|---|
GEM TYPE | : Tourmaline |
TOTAL WEIGHT | : 2.31ct |
SIZE : (LxWxH) | : 8.4x7.3x5.8mm |
SHAPE | : Oval |
COLOR | : Red/Orange |
HARDNESS | : 7-7.5 |
ORIGIN | : Nigeria |
TREATMENT | : Unheated / Untreated |
Tourmaline
Although it has been known since ancient times in the Mediterranean region, the Dutch began importing them in 1703 from Sri Lanka. They named it Sinhalese "Turamali" - stone with mixed colors.
A very characteristic feature of tourmaline is the readiness with which it becomes electrified. By heating and subsequently cooling, as well as applying pressure, e.g. by rubbing, a tourmaline crystal will become electrically charged. It will then attract dust particles and small pieces of paper (pyro and piezoelectricity).
(Ca,K,Na)(Al,Fe,Li,Mg,Mn)3 (Al,Cr,Fe,V)6(BO3)3(Si,Al,B)6O18(OH,F)
Product Details | |
---|---|
GEM TYPE | : Tourmaline |
TOTAL WEIGHT | : 2.31ct |
SIZE : (LxWxH) | : 8.4x7.3x5.8mm |
SHAPE | : Oval |
COLOR | : Red/Orange |
HARDNESS | : 7-7.5 |
ORIGIN | : Nigeria |
TREATMENT | : Unheated / Untreated |