Lime Green Tourmaline 13.58ct

What is Green Tourmaline?

Green Tourmaline is the elbaite variety of tourmaline, coloured by iron and manganese. A guide to the gem, and to buying one well.

About Green Tourmaline

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Species
Tourmaline
Variety
Elbaite
Hardness (Mohs)
7 - 7.5
Refractive index
1.61 - 1.64
Colour caused by
Iron and manganese

Green Tourmaline, a captivating member of the tourmaline family, is celebrated for its lush and verdant hues, reminiscent of the most vibrant forests. This exquisite gemstone is found in regions such as Africa, Congo, Mozambique, and Nigeria, each contributing to its unique allure. Its colour, ranging from deep forest green to vivid grassy tones, is a primary driver of its value, alongside clarity and cut. Green Tourmalines are available in a spectrum of clarity grades from internally flawless (IF) to slightly included (SI-2), with cuts that enhance their natural brilliance, including Fine Step, Emerald, and Modified Brilliant cuts.

While some Green Tourmalines are unheated, others undergo a gentle heating process to enhance their natural beauty. Many of our stones are accompanied by a laboratory certificate from esteemed institutions like GIA, GIT, or GRS, and certification is available upon request for any stone. The price of Green Tourmaline starts from around $57 per carat, reflecting its desirability and rarity. Each stone is a testament to nature's artistry, promising a unique addition to any jewellery collection.

Judging quality

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What drives the value

  • Color intensity
  • Clarity
  • Cut quality

What to watch for when buying

  • Overlooking the impact of inclusions on value
  • Confusing with other green gemstones

Inclusions you may see

  • Natural inclusions such as needles or color zoning

Origin, treatment and trade names

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TreatmentAs disclosed for the stones we sell; every listing states its own.

Unheated

Trade names

None

Price per carat

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Typical price
$180 per carat
Most stones
$104–$287 per carat
Based on
261 stones in our stock, updated weekly. Green Tourmaline prices by carat size →

From our stock

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From the journal

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Frequently Asked Questions

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Where do Green Tourmalines originate?

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Green Tourmalines in our collection originate from Africa, including specific regions such as Congo, Mozambique, and Nigeria.

Are Green Tourmalines treated?

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Some Green Tourmalines are unheated, while others may undergo a gentle heating process to enhance their natural colour and clarity.

What drives the value of Green Tourmaline?

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The value of Green Tourmaline is driven by its colour, clarity, and cut. Rich, vivid greens and high clarity grades, such as IF and VVS, are particularly prized.

How should I choose a Green Tourmaline?

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When choosing a Green Tourmaline, consider the intensity of its green colour, the clarity grade, and the quality of the cut. Each of these factors contributes to the gemstone's overall beauty and allure.

Is certification available for Green Tourmalines?

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Many Green Tourmalines are accompanied by a certificate from labs such as GIA, GIT, or GRS. Certification is available upon request for any stone.