Tourmaline from Namibia • 0.66 ct

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Attributs de la pierre

Origine de la pierre

Valeur & critères de qualité

Traitements & améliorations

Characteristics of Tourmaline

Its name probably comes from the word "turmali," a Sinhalese word (from Sri Lanka) meaning "stone of mixed colors."

Minéral

Tourmaline is a group of minerals from the silicate family

Composition

Variable chemical compositions

Couleur

All colors

Indice de réfraction

1.615 - 1.655

Biréfringence

None

Densité

3 to 3.2

Dureté de Mohs

7 to 7.5

Origin of Tourmaline

Geographical sources and historical origins

Brazil

Ceylon Sri Lanka

Tourmaline is a fascinating and very rich stone: in reality, it is not just a single stone, but a group of highly diverse minerals displaying all colors. Tourmalines of different colors often have a specific name on the market: verdelite for the green one, the rubellite for the red-pink, the indigolite for the bleue or dravite for the tourmaline jaune.

The main production sites are Brazil and Sri Lanka.

Moreover, several stones that were initially considered rubies turned out to be tourmalines. This is the case, for example, of the rubellite tourmaline in the crown of Saint Wenceslas, the jewel of the Bohemian crown.

The value and quality of a Tourmaline

How to determine the value of a Tourmaline?

The most famous tourmaline is tourmaline Paraiba, blue to neon green. Discovered in the 1980s in the Paraiba mine in Brazil, these tourmalines are now among the most sought-after stones in the world. Some particular tourmalines are multicolored and display strong color zoning, making them very popular, especially among collectors.

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The chrome tourmaline, rich in chromium and vanadium, offers an intense green reminiscent of Colombian emerald or tsavorite garnet, and is also highly sought after.

On the other hand, the black tourmaline is the most common and therefore the most economical. Despite this, it has the same physical properties as the others, making it a stone with good value for money.

The pink tourmalines, notably the bright pink shades, are also highly sought after. Bicolored or tricolored stones, such as the watermelon tourmaline, are appreciated for their combined shades of red, green, and sometimes white, which makes them particularly popular.

Processing and enhancement of Tourmaline

What are these treatments?

Chauffe à haute température : This common treatment is used to lighten blue and green tourmalines. Pink tourmalines are often heated to change from an orange tone to a vibrant pink.

Irradiation : It makes it possible to obtain red, deep pink, yellow, or orange colors. However, these shades may fade when exposed to heat or intense light.

Filling : Resins are used to fill the inclusions in the stone.

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Bonnot Paris selects only natural, non-irradiated, and non-filled Tourmalines.

Our Sourcing of Precious Stones

At Bonnot Paris, we are committed to providing the best precious stones through rigorous and ethical sourcing.

We've developed three main sourcing methods to ensure the quality and traceability of our gems: directly from mines, through brokers, and from renowned cutting centers. Discover our methods in detail below.

LEVEL 1

Directly at the mine

We favor direct partnerships with mines, which allows us to obtain rough gemstones directly from the source.

Our partnerships span the globe, including Africa (Namibia, Mozambique, Tanzania, Kenya), Vietnam, and Sri Lanka. We carefully select gemstones based on their quality and then have them cut by our workshops in France and Bangkok, ensuring complete control over the transformation process.

LEVEL 2

From local Brokers

Our collaborations with international brokers allow us to acquire precious stones over a wide geographical area.

These brokers, based in Africa, Brazil, Colombia, and Vietnam, travel across vast territories to source gemstones that meet our strict criteria of quality, traceability, and price. The purchased rough stones are then cut in our specialized workshops in France and Bangkok.

LEVEL 3

From the main pruning centers

We have strategically located offices in Jaipur, Bangkok and Beruwala (Sri Lanka).

These centers allow us to purchase pre-cut gemstones, such as Zambian emeralds in Jaipur or sapphires and other various gemstones in Sri Lanka and Bangkok. Thanks to these offices, we can precisely meet the specific demands of our customers by offering a wide range of high-quality stones.

More competitive prices

These three levels of sourcing allow us to offer you the best precious stones at the best price, while guaranteeing their origin and exceptional quality.

We are committed to maintaining these standards to continue to satisfy our most demanding customers.

LEVEL 4 - NOT APPLIED AT BONNOT PARIS

From Merchants Resellers

The vast majority of traditional jewelers use dealers in their country to buy their stones.

This results in a limited choice of products and, above all, prices that are far removed from market prices.

LEVEL 5 - NOT APPLIED AT BONNOT PARIS

At the jeweler

Once again, the majority of jewelers tend to favor the sale of their own stones to the detriment of customer desires.

By offering only a limited selection, the jeweler inevitably influences the choice. At Bonnot Paris, it's the customer who chooses, and we source the ideal stone for their needs.

Certification and Ethics: OurCommitments

Certification and ethics are essential pillars of Maison Bonnot Paris. Each stone we offer is certified by renowned independent laboratories, such as GIA, AIGS, ICA, LFG, and SSEF.

This guarantees the authenticity and quality of our gems. In addition, we pride ourselves on knowing the origin of the majority of the stones we offer.

Many come from brokers located in extraction areas we know well, ensuring impeccable traceability and ethics.

Although ethics is at the heart of our commitment, we recognize that much remains to be done in this area.

We are committed to continuing our efforts to ensure responsible and ethical sourcing of every stone.

Contact us

Certification by partner laboratories

At Bonnot Paris, each precious stone goes through our certification laboratory.

Through rigorous testing and state-of-the-art equipment, we guarantee the authenticity, purity, and quality of our gemstones. Each stone is accompanied by a certificate of authenticity issued by our experts, ensuring our clients complete transparency and absolute confidence in their investment.

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Expertise in French Jewelry

At Bonnot Paris, we are proud to perpetuate the tradition of French jewelry craftsmanship.

Each piece is designed and crafted in our workshop in France, where expertise and innovation combine to create unique and timeless jewelry. We carefully select the rarest gemstones to offer our customers exceptional quality.

Rare and Exclusive Gems

Bonnot Paris stands out for its rigorous selection of precious and rare gems.

Our experts travel the world to discover stones with unique colors and radiances. Each gem is chosen for its beauty, rarity, and value, guaranteeing exceptional jewelry that will enhance every moment of your life.

Custom Jewelry

Make your dreams come true with Bonnot Paris.

We offer a bespoke jewelry design service, where every detail is carefully considered to match your desires. From design to completion, we guide you every step of the way to create a piece that tells your story and reflects your personality.

Our Instagram news

Follow us on Instagram to discover our latest creations, behind-the-scenes looks at our workshop, and exclusive glimpses of our unique gemstones.

Stay connected with Bonnot Paris and be inspired by our innovative designs and exceptional craftsmanship. Join our community and share your passion for exceptional jewelry.

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Testimonials

"My experience at Bonnot Paris was incredible from start to finish. From the first meeting, I knew I was in good hands.
François took the time to understand my needs and preferences, and presented me with a selection of stones that were each more beautiful than the last. The design process was truly collaborative. The designer drew 5 options and was very receptive to my feedback. The end result is a custom-made ring that I love."
Christelle

"We called on Mr. Deprez to create our wedding rings. From the first meeting, he understood my husband's style. The designs are very well done, and the entire team is very attentive to any changes that may be necessary. Mr. Deprez was also able to adapt perfectly to the budget he was given.
The rings are of impeccable quality. We will definitely use them again for other projects!"
Oceane

“I am absolutely delighted with the experience I had with Bonnot Joaillerie creating a custom engagement ring for my fiancée.
The process was smooth and enjoyable, and the staff was incredibly professional, attentive, and patient. François was truly able to guide me through the selection of stones (size, quality, etc.). Their expertise and attention to detail exceeded all my expectations.
The ring is simply magnificent, perfectly reflecting my fiancée's tastes and personality!"
Tidiane

"Bonnot Paris jewelry is exceptional. The stones are dazzlingly beautiful. François sets out straight away to conquer exceptional gems!
Why go to a "famous" jewelry house when François and his team will guide you throughout the process of creating a unique piece of jewelry, perfectly suited to your tastes and personality?
Eugenie