Tourmaline Jewelry: Colors, Meaning, and How to Choose

By Dmitry Strugovshchikov, founder of STRUGA

Tourmaline is not one stone but a family of boron silicate minerals that crystallize in nearly every color — and the color you see is decided by tiny shifts in composition inside the same crystal, not by treatment. A single tourmaline can run pink at the center and green at the rim, the watermelon effect. The mineral sits at 7–7.5 on the Mohs scale, roughly 95% of what occurs in nature is the black variety, and the copper-bearing Paraiba type was identified only in 1989. The named varieties are the same mineral wearing different chemistry: Rubellite (pink to red), Indicolite (blue), Verdelite (green), Schorl (black), and Paraiba (neon blue-green, the rarest).

Updated August 21, 2026

- Tourmaline is a boron silicate mineral found in granite and metamorphic rocks worldwide; slight composition shifts inside one crystal produce its full color range, including the pink-center, green-rim watermelon effect.

- The named varieties are one mineral with different chemistry: Rubellite (pink to red), Indicolite (blue), Verdelite (green), Schorl (black, iron-rich and opaque), and Paraiba (neon blue-green, the rarest).

- Tourmaline rates 7–7.5 on the Mohs scale — harder than amethyst (7), softer than sapphire (9) — durable for daily wear but not for ultrasonic cleaners.

- Five factors set tourmaline price: color saturation, color rarity, clarity, size, and origin (Brazil, Afghanistan, Nigeria, Maine).

- STRUGA sets raw, unheated, untreated tourmaline in 925 sterling silver and can source specific colors through Custom Order within a 4–6 week lead time; Paraiba, vivid indicolite, and watermelon are subject to availability.

The form continues in current pieces: Thorn Amulet Earring #13 — Purple Tourmaline (M), and Thorn Amulet Earring #14 — Grey Tourmaline (M).

Tourmaline: The Gemstone With a Thousand Colors

Tourmaline is not a single mineral species. The International Mineralogical Association recognised 13 species in 1997 and 42 by 2025, and the count is still moving. That is where the colour range comes from: each species carries a different set of elements inside the same crystal frame. Two of them, elbaite and schorl, supply most of the tourmaline that reaches jewellery at all.

What Is Tourmaline?

Tourmaline is a boron silicate mineral found in granite and metamorphic rocks worldwide. Slight variations in composition produce dramatically different colors. A single crystal can contain multiple colors, creating the famous watermelon effect with pink centers and green exteriors.

Key varieties include Rubellite (pink to red), Indicolite (blue), Verdelite (green), Schorl (black), and Paraiba (neon blue-green, the rarest). Each has distinct visual properties, but they all share a characteristic vitreous luster and pleochroism.

What are the named varieties of tourmaline, and how do they differ?

The trade names are not separate stones. They are one mineral group wearing different chemistry, and each name records which element entered the crystal as it grew. Iron gives black and green. Manganese gives pink and red. Copper, found in tourmaline only in 1989, gives the neon blue-green of Paraiba.

Variety	Colour	What sets the colour	Note
Schorl	Black, opaque	Iron	About 95% of all tourmaline in nature; never transparent
Verdelite	Green	Iron	The most available coloured tourmaline
Rubellite	Pink to red	Manganese	Deep red carries the highest price outside Paraiba
Indicolite	Blue	Iron	Rare in a saturated tone
Achroite	Colourless	Almost no colouring elements	The mineral with its chemistry stripped out
Watermelon	Pink core, green rim	Composition shift during growth	One crystal carrying two colours, not two stones
Paraiba	Neon blue-green	Copper with manganese	Found in 1989 in Brazil; the most expensive tourmaline

Why the black one is common and the colours are not

Schorl, the iron-rich black variety, makes up roughly 95% of all tourmaline found in nature. It is never transparent, at any thickness. So the black tourmaline sold as a pendant is the ordinary form of the mineral, and the pink, green and blue stones are the exceptions to it. Rarity in tourmaline does not sit in the mineral. It sits in the colour.

Tourmaline in Silver Jewelry

Tourmaline pairs exceptionally well with sterling silver, particularly in oxidized finishes. The contrast between dark, aged silver and a vivid pink or green tourmaline creates a visual tension that polished gold cannot achieve. This is why STRUGA features tourmaline prominently, from the Thorn Frame earrings to pendants where the stone becomes the visual center of an architectural silver form.

Why was tourmaline mistaken for many different stones for a century?

The name comes from the Sinhalese word turmali, which Sri Lankan traders used for parcels of mixed, unidentified gems. That is the honest origin. The stone was named for the confusion it caused.

Dutch merchants of the East India Company began importing it in 1703 and noticed something odd. Warmed by sunlight or by rubbing, the crystals pulled ash out of their tobacco pipes. They called the stone aschentrekker, the ash puller.

What the ash actually proved

Tourmaline is pyroelectric and piezoelectric. It develops an electric charge when heated or compressed, and that charge attracts light debris. The effect is still visible in museums, where warm display lighting is enough to make a raw crystal gather dust. It took close to a hundred years to establish that the red, green, blue and black ash pullers were one mineral rather than seven. The colour range that looks like a marketing invention today is the same thing that misled mineralogists for a century.

Color Meanings and Properties

Pink Tourmaline ranges from soft baby-pink to deep raspberry-red. In dark silver settings, pink tourmaline creates a striking contrast that draws the eye immediately.

Green Tourmaline ranges from bright spring-green to deep forest tones. Forest-green specimens in oxidized silver produce a rich, almost ancient look.

Blue Tourmaline (Indicolite) is one of the rarer varieties. Its deep blue tones complement silver beautifully.

Black Tourmaline (Schorl) is the iron-rich, opaque variety, near-black in colour. On oxidized silver it creates a monochromatic intensity that is subtle yet powerful.

Purple Tourmaline sits between the warmth of pink and the depth of blue. Rare and visually complex, purple specimens shift color under different lighting.

Black tourmaline or obsidian — how do you tell them apart?

Both read as black in a dark silver setting, and they are not related. Tourmaline is a crystal with an internal structure. Obsidian is volcanic glass with no crystal structure at all. The difference shows up in wear rather than in a photograph.

Property	Black tourmaline (Schorl)	Obsidian
Class	Borosilicate mineral, trigonal crystal	Volcanic glass, non-crystalline
Mohs hardness	7–7.5	5–5.5
Surface	Striated along the length of the crystal	Glassy, with shell-shaped fracture
Transparency	Opaque at any thickness	Opaque to translucent at the edges
Daily wear	Resists scratching from household dust	Scratches and chips readily

Why the hardness gap decides it

Ordinary household dust contains quartz, which sits at 7 on the Mohs scale. Obsidian at 5–5.5 is below that, so wiping it clean slowly dulls the surface. Schorl at 7–7.5 sits above it. For a piece worn every day rather than kept on a shelf, that single gap matters more than any claimed property of either stone.

Other variations in the same family: Thorn Amulet Earring #23 — Transparent Tourmaline (S), and Thorn Amulet Earring #20 — Grey Tourmaline (M).

How to Choose Tourmaline Jewelry

Prioritize color over clarity. A stone with vivid, rich color and minor inclusions is more visually striking than a pale, perfectly clear specimen.

Consider the setting. Bezel settings protect the stone while allowing maximum visibility. STRUGA designs typically use silver bezels that frame the tourmaline as a focal element.

Natural shapes add character. Cabochon-cut tourmalines show color depth beautifully. Rough stones preserve the natural geometry, pairing well with brutalist designs.

Which tourmaline colours does STRUGA actually work with?

Most guides describe colours nobody can show you. This is the current catalogue instead. STRUGA holds 25 tourmaline pieces, all earrings, all in the RITUAL world and the Amulet family, set in 925 sterling silver.

Colour	Pieces	Note
Pink	7	Rubellite, from soft rose to raspberry
Green	7	Verdelite, from spring tone to forest
Grey	3	A tone most jewellers do not stock at all
Purple	1	Shifts between pink and blue under different light
Pink-grey	1	Two tones inside one crystal
Transparent and achroite	2	The colourless variety
Double Thorn	4	Stone chosen per piece

What it costs and how it is finished

Prices run from about $130 to $220, set by stone size (S, M, L) rather than by colour. Thirteen of the 25 are blackened by hand at the bench. The other twelve are left bare, so the silver darkens on the wearer instead. Each piece is made to order in Bali in about two weeks; sourcing a specific colour through Custom Order takes 4–6 weeks.

• Classic Amulet Earring #26 — Achroite, colourless tourmaline in a small frame.
• Thorn Amulet Earring #14 — Grey Tourmaline, the tone the trade rarely cuts.
• Thorn Amulet Earring #9 — Pink Tourmaline, the largest rubellite in the run.
• The whole set sits in Tourmaline Silver Jewelry.

Explore STRUGA tourmaline jewelry: handset natural stones in dark sterling silver. Browse tourmaline jewelry

How do you care for tourmaline jewelry day to day?

Tourmaline at Mohs 7–7.5 is harder than amethyst (7), softer than sapphire (9). For jewelry purposes, this means tourmaline is durable enough for daily wear in most contexts but should be protected from sharp impact and harsh abrasives.

• Daily wear: Fine for rings, pendants, and earrings. Take off for sports involving impact (climbing, contact sports, heavy lifting with bare hands).
• Water: Tourmaline itself is water-resistant. Avoid extended hot water (loosens settings over years) and chlorinated pool water (affects the silver setting more than the stone). Brief contact during handwashing is fine.
• Cleaning: Soft cloth and warm soapy water for routine cleaning. Soft toothbrush for textured settings. Avoid ultrasonic cleaners — vibration can stress the bezel and loosen raw stones.
• Storage: Keep separate from harder stones (diamond, sapphire). Hard stones can scratch tourmaline if they bump together in storage.

Have setting tightness checked annually if the piece is worn frequently. STRUGA offers this as part of lifetime maintenance for our pieces.

Sourcing and pricing — what affects tourmaline value

Five factors affect tourmaline pricing on the global market:

1. Color saturation. Deep, vivid colors (rich pink, deep green, intense blue) command the highest prices. Pale or washed-out stones are significantly less valuable.
2. Color rarity. Paraiba blue (copper-bearing tourmaline from Brazil) is the rarest and most expensive. Pure indicolite blue is also rare. Common pink and green are more accessible.
3. Clarity. Eye-clean stones cost more than included ones. STRUGA's raw stones celebrate inclusions as character; jewelry-store grade stones are typically heat-treated for clarity.
4. Size. Larger stones are exponentially more expensive — a 5-carat rich pink tourmaline can cost 5x what five 1-carat pieces cost.
5. Origin. Brazilian, Afghan, Nigerian, and certain American (Maine) tourmaline carry different prices based on traditional source reputation.

STRUGA uses raw, untreated stones across the color range. Source documentation is available on request for higher-priced pieces.

Why raw vs. faceted?

Conventional jewelry facets tourmaline into precise geometric shapes — emerald cut, oval cut, pear cut — removing all trace of the crystal's natural form. The cut maximizes brilliance and standardizes the stone. STRUGA uses raw stones because:

• Each crystal is unique. No two raw tourmalines are alike. Faceted stones aim for visual consistency; raw stones celebrate variation.
• Natural surface catches light unpredictably. Faceted stones have predictable brilliance; raw stones produce unexpected sparks where natural surface and light intersect. The visual interest is more dynamic.
• Material honesty. A faceted stone is the cutter's interpretation of the stone. A raw stone is the stone itself, presented as it grew. STRUGA's design philosophy prioritizes material as material, not as canvas.
• Raw over faceted. Raw, uncut stones keep the crystal's natural geometry and surface, which reads very differently from a standardized faceted cut. The appeal here is the material and the form, not any claimed property.
• Architecturally compatible. Raw crystals have angular, geometric form that matches STRUGA's brutalist and architectural design language. Faceted stones often read as too refined for the surrounding metal.

How can you tell real tourmaline from fake?

Four checks separate natural tourmaline from glass and dyed quartz, and three of them need no instrument. Tourmaline is pyroelectric: warm the crystal and it takes a surface charge that lifts ash or paper dust off a table. Glass does nothing. The effect was first recorded in 1707 by Johann Georg Schmidt, who wrote that hot tourmaline «could attract the ashes from the warm or burning coals»; in 1747 Linnaeus catalogued the mineral as Lapidem Electricum, the electric stone.

Check	Natural tourmaline	Glass or dyed quartz
Warmed in the hand	Attracts ash and paper dust	No reaction
Seen from two angles	Colour depth shifts (pleochroism)	Same colour from every angle
Surface of a rough crystal	Striations running along the length	Smooth, or a moulding seam
Inside the stone	Angular inclusions and fine fractures	Round gas bubbles and swirls

The fourth check is hardness. Tourmaline sits at 7–7.5 on the Mohs scale, glass at about 5.5, so household dust dulls an imitation and leaves the real stone alone. All 25 tourmaline pieces in the STRUGA catalogue are unheated, which is why inclusions are visible in them at all. A stone with no visible inclusions at all, evenly coloured and cheap, is the warning sign.

Black tourmaline, onyx or kyanite — which black stone is it?

Stone	Mohs	Surface	Tell
Black tourmaline (Schorl)	7–7.5	Striated along the crystal	Takes a charge when warmed
Black onyx	6.5–7	Even, glassy polish	Banded chalcedony, usually dyed
Black kyanite	4.5–7	Bladed, splits into sheets	Hardness differs along and across the blade

Continue from the journal to a current STRUGA object: Thorn Amulet Earring #6 — Green Tourmaline.