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A faceted tourmaline
The stones · Tourmaline

The stone of mixed colours.

No mineral on earth holds more colour. We deal in one species and nothing else — cut and rough, named correctly, with origin and treatment stated on every stone.

View cut stonesRough tourmaline

One species, every colour

Rubellite, indicolite, verdelite, chrome, canary, watermelon, cuprian. A single mineral covers a range no other gem family can.

Correctly named

Paraíba means cuprian elbaite, confirmed by chemistry — not a colour that resembles it. We write what a stone is, and what it is not.

Stated, not implied

Origin, treatment and weight on every listing. Heat is disclosed. Where a laboratory report exists, it is shown.

The colour range

Twelve names for one mineral

Read the colour guide
RubelliteManganese
IndicoliteIron
VerdeliteIron
ChromeChromium, vanadium
ParaíbaCopper, manganese
WatermelonZoned Mn and Fe
CanaryManganese
AchroiteNear-free of chromophores
DraviteMagnesium
SchorlIron
Bi-colourChanging melt chemistry
Cat's eyeParallel growth tubes
The collection

Cut stones

Pink Tourmaline

Pink Tourmaline

3.60 ct · Mozambique

Price on request

Rough

Crystals, before anyone decides what they should become

Striated prisms, waterworn pebbles, bi-colour sections. We sell facet-grade rough by the piece and by coherent parcels — same variety, same colour range, narrow weight band — so a cutter knows what they are buying.

See rough parcels
What we state on every parcel
  • Species and variety, with the correct name
  • Locality, when it is known and verifiable
  • Total weight in grams, and piece count
  • Clean-yield estimate, honestly given
  • Whether the material has been heated
History

Three hundred years of being mistaken for something else

Dutch traders brought it from Ceylon in the early 1700s and found it pulled ash out of a fire. A Russian crown jewel called a ruby for two centuries turned out to be one. It took until 1989 for the stone to produce a colour nobody had a name for.

Read the history
Journal

What we learn, written down

Buying notes, laboratory results, nomenclature, and the tests we run before a stone is listed. Written by the desk, for people who would rather understand a stone than be sold one.

Read the journal
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Tourmaline in the collection

Shop all tourmaline
The reference

Everything we know about this stone

Five pages, written to the standard we would want if we were the ones buying. It is the same knowledge we buy with.

Chemistry

The formula, what sits in each site, six species out of thirty, and which ion makes which colour.

Colour

Twelve varieties, how to judge hue, saturation and tone — and what Paraíba is actually allowed to mean.

Properties

Refractive index, birefringence, specific gravity, pleochroism, and what the instruments cannot tell you.

Origins

Brazil, Mozambique, Nigeria, Afghanistan, Madagascar and the rest — and how origin is determined.

History

From turmali in Ceylon and the Dutch ash-puller to a colour nobody had a name for in 1989.

Looking for a particular tourmaline?

Variety, colour, weight range and budget. We buy across every source, and we will tell you plainly when what you are describing does not exist at that price.

Cut stonesWholesale & bespoke