Gemstone guide
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What is Bi Colour Tourmaline?
Bi Colour Tourmaline is a variety of tourmaline, coloured by multiple trace elements. A guide to the gem, and to buying one well.
About Bi Colour Tourmaline
01- Species
- Tourmaline
- Variety
- Bi Colour Tourmaline
- Hardness (Mohs)
- 7-7.5
- Refractive index
- 1.61-1.64
- Colour caused by
- Multiple trace elements
Bi Colour Tourmaline is a captivating gemstone that enchants with its unique duality of hues, often reminiscent of a painter's palette. This gemstone is celebrated for its stunning interplay of colours, typically presenting a harmonious blend that can range from vibrant greens to delicate pinks, earning trade names such as Watermelon and Indicolite. Originating from esteemed locales such as Africa, Congo, Mozambique, and Nigeria, each Bi Colour Tourmaline is a testament to the Earth's natural artistry.
Every stone within our collection is a singular masterpiece, unheated and meticulously cut to enhance its natural beauty. With cuts ranging from the elegant Emerald Cut to the intricate Modified Brilliant Cut, these gems are crafted to captivate. The value of Bi Colour Tourmaline is driven by its vivid colour zoning, clarity, and the precision of its cut. Prices start from around $57 per carat, reflecting the gemstone's rarity and allure.
Judging quality
02What drives the value
- Color saturation
- Clarity
- Size
What to watch for when buying
- Overpaying for low clarity stones
- Misidentification of color varieties
Origin, treatment and trade names
03Where it comes from
Trade names
Price per carat
04- Typical price
- $352 per carat
- Most stones
- $159–$756 per carat
- Based on
- 27 stones in our stock, updated weekly. Bi Colour Tourmaline prices by carat size →
From our stock
05
From the journal
06
Frequently Asked Questions
07Where do Bi Colour Tourmalines come from?
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Bi Colour Tourmalines in our collection originate from Africa, Congo, Mozambique, and Nigeria, regions renowned for producing stones of exceptional beauty.
Are Bi Colour Tourmalines treated?
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Our Bi Colour Tourmalines are unheated, preserving their natural allure and authenticity.
What determines the value of a Bi Colour Tourmaline?
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The value is influenced by the vibrancy and harmony of its colour zoning, the clarity of the stone, and the precision of its cut.
How should I choose a Bi Colour Tourmaline?
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Consider the colour combination, clarity, and cut that resonate with your personal aesthetic, as each stone is uniquely beautiful.
Are Bi Colour Tourmalines certified?
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Many of our Bi Colour Tourmalines come with a laboratory certificate, and certification is available on request for any stone.
Shop
Bi Colour Tourmaline
Every stone shows its own price, weight, origin and treatment. Browse our bi colour tourmaline, or contact our team for personal help choosing one.