Gemstone guide
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What is Blue Tourmaline?
Blue Tourmaline is the indicolite variety of tourmaline, coloured by iron and other trace elements. A guide to the gem, and to buying one well.
About Blue Tourmaline
01- Species
- Tourmaline
- Variety
- Indicolite
- Hardness (Mohs)
- 7-7.5
- Refractive index
- 1.61-1.64
- Colour caused by
- Iron and other trace elements
Blue Tourmaline, a gem of exceptional allure, captivates with its rich spectrum of blue hues, ranging from deep oceanic tones to lighter azure shades. Known in the trade as Indicolite, this exquisite gemstone is celebrated for its unique colour and clarity, which are the primary determinants of its value. Our collection features stones originating from the esteemed regions of Africa, including Mozambique, Nigeria, and the Congo. Each stone is one-of-a-kind, with its origin and any treatments, such as heating, fully disclosed to ensure transparency.
At STARLANKA, we offer Blue Tourmaline in a variety of sophisticated cuts, from the classic Emerald and Asscher cuts to the intricate Fine Step and Brilliant Diamond cuts. These stones are available in clarity grades ranging from Internally Flawless (IF) to Slightly Included (SI), allowing you to select a piece that resonates with your personal taste. With prices starting from around $62 per carat, Blue Tourmaline offers a refined elegance that is both timeless and enchanting.
Judging quality
02What drives the value
- Color saturation
- Clarity
- Size
What to watch for when buying
- Misidentification with lower-quality blue stones
- Overlooking inclusions that affect clarity
Inclusions you may see
- Natural inclusions such as needles or color zoning
Origin, treatment and trade names
03Where it comes from
TreatmentAs disclosed for the stones we sell; every listing states its own.
Trade names
From our stock
04From the journal
05Frequently Asked Questions
06What are the origins of Blue Tourmaline?
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Our Blue Tourmaline originates from Africa, with notable sources including Mozambique, Nigeria, and the Congo.
Is Blue Tourmaline treated?
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Blue Tourmaline may be unheated or subjected to heat treatment to enhance its natural beauty. All treatments are disclosed.
What drives the value of Blue Tourmaline?
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The value of Blue Tourmaline is primarily driven by its colour intensity, clarity, and the quality of its cut.
How should I choose a Blue Tourmaline?
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When choosing a Blue Tourmaline, consider the stone's colour, clarity, and cut, as well as your personal aesthetic preferences.
Is certification available for Blue Tourmaline?
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Many Blue Tourmaline stones are accompanied by a laboratory certificate from GRS. Certification is available on request for any stone.
Shop
Blue Tourmaline
Every stone shows its own price, weight, origin and treatment. Browse our blue tourmaline, or contact our team for personal help choosing one.





