Green-Yellow, Yellow, Orange & Brown Tourmaline
A fine palette of Earth tones...
Green-Yellow, Yellow, Orange and Brown Tourmalines are Dravites that are primarily found in the rich gem deposits of East Africa.
They are colored by the trace elements vanadium and chromium and many will display a pink to pinkish-red color under the Chelsea filter!
Occasionally, Elbaites are found in these colors too.
The tourmaline family is found in many different locations around the world including Brazil, Nigeria, Mozambique, USA (California, Maine), Congo, Tanzania, and has one of the widest color ranges found in gemstones.
Since tourmaline grows in long crystals referred to as “pencils” they are frequently cut as elongated emerald cuts that are perfect for pendants, earrings and even some rings.
Tourmaline is one of the birthstones for October and celebrates the 8th Anniversary.
Lots of choice in colors for October birthdays!
We have many more shapes and sizes available in Green-Yellow, Yellow, Orange and Brown Tourmaline – please contact us if you don’t find what you are looking for in our online inventory.
|Tourmaline, Dravite and Tourmaline, Elbaite|
RI = 1.624 (+/-0.005) – 1.644 (+/-0.006) DR
SG = 3.06 (-0.05, +0.15)
Dispersion = 0.017
Hardness = 7-7.5
suitable for use in jewelry
Pyroelectric – becomes electrically charged when heated
Chrome/vanadium bearing Dravite gems in green-yellow-orange and brown colors are almost always Natural, untretaed.
Elbaite gems can be 100% natural with no treatments or enhancements, or heated, or irradiated and heated
see policy on Treatment Disclosure
Dravite gems are colored by chromium and vanadium;
Calibrated sizes up to 5mm
All standard cuts and free sizes
Chrome/Vanadium bearing Dravite is found only in Tanzania (Landanai, Morogoro, Umba Valley) and Kenya (Taita-Taveta)
Elbaite is found in Brazil, Nigeria, Mozambique, Zambia, Afghanistan, USA, and other localities worldwide