Tourmaline Gemstone Guide: Colors, Prices, Paraiba, Watermelon and What Makes This Gem So Special

If there is one gemstone that truly shows nature’s creativity, it is tourmaline. From electric blues and deep forest greens to bright pinks and rare watermelon patterns, tourmaline comes in more colours than almost any other gemstone on Earth.

This incredible variety is one reason why collectors, jewellers, and gemstone lovers are obsessed with tourmaline. Whether you are shopping for jewellery, investing in gemstones, or simply learning about gemology, understanding tourmaline can help you appreciate why some stones cost £50 while others can sell for tens of thousands per carat.

In this guide, we will explore tourmaline colours, prices, origins, treatments, rare varieties like Paraiba and Watermelon Tourmaline, and what to look for before buying.

What Is Tourmaline?

Tourmaline is one of the most colourful gemstone families in the world. It is a mineral group that forms in many different colours depending on the elements present during its growth.

Unlike gemstones that are known for only one colour, tourmaline can appear in:

Green
Pink
Red
Blue
Yellow
Orange
Purple
Black
Colourless
Multicolour combinations

Tourmaline is also the birthstone for October, making it especially popular in jewellery.

Why Tourmaline Is So Popular

Tourmaline stands out because it offers something for almost every taste and budget.

Some people love soft pastel pinks. Others prefer dark forest greens or glowing electric blues. Tourmaline even forms stones with multiple colours inside the same crystal.

The gemstone is also loved because:

It is available in many sizes
Large crystals can form naturally
Many stones are untreated
Unique colours make every stone feel different
It works beautifully in rings, pendants, and collector jewellery

Tourmaline Colours Explained

Green Tourmaline

Green tourmaline is one of the most common and popular varieties. It ranges from light mint shades to deep forest greens.

Mint Green Tourmaline

Mint tourmaline has become increasingly fashionable in modern jewellery. Its soft fresh appearance works beautifully with yellow gold and rose gold settings.

These stones often have a clean and elegant look that appeals to younger jewellery buyers.

Chrome Tourmaline

Chrome Tourmaline is a rarer green variety coloured by chromium.

It is known for:

Rich forest green colour
Strong saturation
Higher rarity
Excellent brilliance

Chrome tourmaline is mainly found in East Africa, especially Kenya and Tanzania.

Large clean stones are difficult to find, which makes fine examples expensive.

Pink Tourmaline

Pink Tourmaline is one of the most recognised tourmaline colours.

These gems are especially popular in:

Birthstone jewellery
Engagement rings
Feminine fine jewellery
Designer gemstone collections

Pink tourmalines often contain inclusions, especially stones from Afghanistan. However, beautiful colour can still make them highly valuable.

Rubellite Tourmaline

Rubellite refers to red or strong reddish-pink tourmaline.

The closer the colour gets to ruby red, the more valuable the stone becomes.

High-quality rubellite is prized because:

Strong red colour is rare
Clean stones are difficult to find
Large stones are uncommon

Fine rubellite can reach hundreds of dollars per carat, especially when the stone has excellent clarity.

Blue Tourmaline

Blue tourmaline is surprisingly underrated in the gemstone market.

Colours range from:

Light ocean blue
Teal blue
Indigo
Deep London blue tones

Many buyers do not even realise blue tourmaline exists, which keeps prices lower than some other rare gemstones.

However, collectors increasingly appreciate these colours because they look unique compared to sapphires or aquamarines.

Seafoam Tourmaline

Seafoam tourmaline features a beautiful mix of blue and green.

This colour has become more desirable as fine chrome tourmaline becomes harder to find in larger sizes.

Seafoam stones often provide:

Better affordability
Larger sizes
Excellent brightness
Modern jewellery appeal

Paraiba Tourmaline: The Most Expensive Tourmaline

Paraiba Tourmaline is considered the king of tourmalines.

This gemstone became famous because of its glowing electric neon blue colour that almost appears to light up from inside.

Why Paraiba Tourmaline Is So Valuable

Paraiba tourmaline contains copper, which creates its famous electric glow.

The most valuable stones show:

Electric turquoise blue
Neon blue-green
Strong brightness
High saturation

Fine Brazilian Paraiba stones can easily reach:

$10,000 per carat
$30,000 per carat
Even higher for exceptional gems

Brazilian stones from the original Paraiba region are the most valuable.

Mozambique Paraiba tourmalines are also beautiful and more affordable, although still extremely expensive compared to ordinary tourmalines.

Heat Treatment in Paraiba Tourmaline

Some Paraiba stones are heated to improve colour.

Purple-toned rough crystals may transform into electric blue after heating.

Unlike many gemstones, tourmaline usually receives minimal treatment compared to rubies or sapphires.

Watermelon Tourmaline: Nature’s Most Unique Colour Combination

Watermelon Tourmaline is one of the most fascinating gemstones in the world.

It naturally forms with:

Pink centre
Green outer layer

Just like a watermelon.

How Watermelon Tourmaline Forms

As the crystal grows, the chemical environment changes. Different minerals enter the crystal structure over time, creating separate colour zones.

When cut across the crystal, the gemstone reveals multiple colours in one slice.

Why Watermelon Tourmaline Is Expensive

Collectors love watermelon tourmaline because:

Every stone looks different
Natural colour zoning is rare
Large pieces are difficult to find
Good symmetry is uncommon

The most valuable specimens show:

Bright pink centre
Strong green outer colour
Clear separation between colours
Minimal fractures

Large high-quality stones can sell for several thousand dollars.

Polychrome Tourmaline

Polychrome Tourmaline contains several colours within one crystal.

Some stones display:

Green
Pink
Red
Yellow
Colourless zones
Dark sections

These gems are especially popular among collectors because no two stones are identical. Madagascar is famous for producing stunning polychrome tourmalines.

What Affects Tourmaline Prices?

Like all gemstones, several factors influence value.

1. Colour

Colour is the biggest factor.

The most expensive colours include:

Paraiba neon blue
Fine rubellite red
Chrome green
Strong watermelon colour combinations

Bright saturated colours are always worth more than pale or muddy stones.

2. Clarity

Tourmaline clarity varies greatly depending on colour.

Green Tourmalines

Clean stones are relatively common.

Pink and Red Tourmalines

Inclusions are expected and accepted more often.

Dangerous Fractures

Large cracks or fissures reduce durability and value.

Small inclusions may be acceptable if the colour is exceptional.

3. Cut

Tourmaline crystals naturally grow in long prism shapes.

Because of this, cutters often choose:

Emerald cuts
Oval cuts
Cushions
Long rectangles

Some stones are cut differently to improve colour saturation rather than preserve weight.

A well-cut tourmaline should:

Reflect light evenly
Show strong colour
Avoid large windows
Maintain symmetry

4. Origin

Certain locations are highly respected in the gemstone trade.

Famous Tourmaline Origins

Brazil
Mozambique
Afghanistan
Madagascar
Kenya
Tanzania
Sri Lanka

Brazil and Congo are especially famous for producing high-quality tourmalines.

Does Tourmaline Have Synthetic Versions?

One fascinating fact about tourmaline is that there are currently no widely known true synthetic tourmalines in the market.

However, there are many imitations.

Common Fake Tourmalines

Glass
Dyed glass
Plastic
Synthetic spinel
Synthetic sapphire

Some fake watermelon tourmalines are even made using coloured glass layers.

What to Look for When Buying Tourmaline

Before purchasing tourmaline, pay attention to these factors.

Choose Colour First

With tourmaline, colour matters more than almost anything else.

A vivid slightly included stone may be worth more than a clean dull stone.

Check for Dangerous Cracks

Small inclusions are normal.

Large fractures that threaten durability are not.

Avoid stones with:

Deep cracks
Surface-reaching fractures
Large weak zones

Examine the Cut

Good tourmaline should:

Shine brightly
Show strong colour
Avoid looking transparent in the middle
Have balanced proportions

Ask About Treatment

Most tourmalines are untreated or simply heated.

Always ask:

Was the stone heated?
Is the colour natural?
Is there a lab report?

Tourmaline is one of the most exciting gemstones in the jewellery world. Few stones offer such an incredible range of colours, patterns, and personalities. From affordable mint greens to legendary Paraiba blues worth tens of thousands per carat, tourmaline has something for every collector and jewellery lover.

Its natural beauty, minimal treatments, and endless colour combinations make it one of the most fascinating gemstones to study and own.
Whether you love the electric glow of Paraiba, the rich reds of rubellite, or the playful colours of watermelon tourmaline, this gemstone family proves that nature can create art more beautiful than anything humans could design