Discover our blog about opals, minerals and gemstone fairs
Discover our blog dedicated to natural opals, their origin, their formation and their value.
Learn to recognize a true opal, choose a quality stone and understand the differences between Australian opals, white opals and black opals.
Our comprehensive guides accompany you to buy an opal with confidence, understand its price and explore the most beautiful stones in the world.
Koroit opal: origin, patterns, prices and purchasing advice
L’opale de Koroit est l’une des opales boulder australiennes les plus reconnaissables. Elle vient du Queensland, en Australie, et se distingue par ses motifs naturels très graphiques. Cette pierre associe l’opale précieuse à une roche brune appelée ironstone. Grâce à...
Mineral Exchange in Millau 2026: dates, place and useful information
Affiche de la Bourse aux minéraux à Millau 2026. Crédit affiche : Kristalia Minéral Expos. Affiche utilisée avec l’autorisation de l’organisateur. Merci à Kristalia Minéral Expos pour son accord.La Bourse aux minéraux à Millau 2026 aura lieu les 17, 18 et 19 juillet...
Opale baker: origin, colours, value and buying advice
L’opale boulder est l’une des opales australiennes les plus appréciées. Elle séduit par ses couleurs intenses, ses formes naturelles et son lien direct avec la roche dans laquelle elle s’est formée. Contrairement à d’autres opales, elle conserve souvent une partie de...
Mineral, Fossile and Jewelry Fair in Saint-Palais-sur-Mer 2026
Poster credit: Universe Minerals – Salon Minerals, Fossiles and Jewelry of Saint-Palais-sur-Mer 2026. Poster used with permission of the organiser.The Minerals, Fossiles and Jewelry Fair of Saint-Palais-sur-Mer 2026 will take place on 4 and 5 July 2026 in the...
Coober Pedy: Australia's White Opal World Capital
Coober Pedy lies in the heart of the Australian desert. This mining city attracts enthusiasts from around the world. Fans know it especially for its white opals, crystal opals and underground houses. It is often called the capital...
Lightning Ridge Opal: Origin, Color, Value and Buying Tips
Lightning Ridge's opal is one of the most sought-after Australian opals in the world. It is famous for its intense colours, spectacular reflections and, above all, its magnificent black opals. Located in New South Wales, Australia, this...
2nd Fossil Mineral Exhibition in Cazaubon-Barbotan-les-Thermes on 11 and 12 July 2026
Visual credit: official poster of the event "Minerals, fossils and dinosaurs – Cazaubon / Barbotan-les-Thermes, 11 & 12 July 2026". Reproduction authorized with the kind agreement of the CPMA organization.The Cazaubon fossil mineral fair returns for a...
Why the opal fascinates collectors so much?
The opal is a precious stone apart. Unlike many gems, it not only seduces by its colour, but by its changing reflections. Depending on the light, the same opal can reveal blue, green, orange, yellow or sometimes even red....
History of Opal: From Antiquity to Today
The opal is one of the most fascinating gemstones in the world. For more than 4,000 years, it has intrigued civilizations with its changing colours and unique reflections. From ancient empires to the famous Australian mines, the history of the opal mixes...
Scholarship at the Minerals and Fossiles of Sainte-Cécile-les-Vignes 2026
The Bourse aux Minéraux et aux Fossiles de Sainte-Cécile-les-Vignes will take place on 13 and 14 June 2026 at the Salle Camille Farjon, in the Vaucluse. This event is organized by the Mineral Geological Association of Sainte Cecile. It is addressed to those passionate about...
Mineral & Gem 2026 in Sainte-Marie-aux-Mines: the must-see fair for lovers of opals and gems
Every year, the Mineral & Gem Fair transforms the city of Sainte-Marie-aux-Mines into a world capital of minerals, fossils and precious stones. Recognized as one of the largest international fairs dedicated to natural gems and natural...
How to clean an opal without damaging and permanently preserving its radiance
The opal is a unique gemstone appreciated for its spectacular color sets and incomparable natural light. Unlike other more resistant gems, the opal has a more fragile structure that requires precise and delicate maintenance....
Why are some opals worth more than diamonds?
Some rare opals are now reaching exceptional prices. In some cases, more expensive opals than diamonds are more attractive to collectors because of their rarity, colour and uniqueness. Australian opals, especially...
Why is Australian opal becoming rare? | Complete Guide 2026
Why is Australian opal becoming increasingly rare? Australian opal is one of the most fascinating gemstones in the world. Its unique color sets - red, green, blue or multicolored - give the impression that a real rainbow...
Australian raw opal prices in 2026: full guide
Introduction The price of Australian raw opals in 2026 is attracting increasing interest. Indeed, these natural stones are increasingly sought after for their unique beauty and their potential after size. However, all raw opals do not have the same...
Price of polished opals in 2026: complete guide to values and estimates .
Introduction The price of polished opals in 2026 varies greatly according to quality, rarity, origin and type of stone. Indeed, some polished opals remain accessible, while others reach much higher price levels. So...
Noble opal, doublette, triplette: how to recognize them?
Noble opal, doublette, triplette: what differences? The opal is a fascinating stone. It attracts with its playful colours, changing light and unique appearance. Yet, many people wonder what is the difference between...
Top 5 gold mines in Australia
Top 5 Doopal Mines in Australia: Complete Guide Introduction Australia is the world leader in opal, with over 90% of world production. Thanks to unique geological conditions, this country offers precious stones in colours...
How do I recognize a real opal? (Full Guide)
How do I recognize a real opal? (Full Guide) Introduction Recognizing a true opal is essential before any purchase, especially given the many imitations available on the market. Between natural opals, synthetic opals and assemblages...
How to polish an opal easily: complete guide for beginners
How to polish an opal easily: complete guide for beginners ✨ Introduction Policing an opal is an essential step to reveal the beauty of this precious stone. Indeed, a raw opal may seem dull at first glance. However,...
Guide to opal: how to recognize, choose and buy an opal
Guide for beginners: Understanding, recognizing and buying an opal Introduction The opal is one of the most fascinating gemstones in the world. Unlike diamonds or rubies, it is distinguished by a unique phenomenon: the game...
Origin of opal: Australian training, history and mines
History of the opal: dinosaurs, opalization and large Australian deposits The opal is one of the most fascinating stones in the world. With its changing reflections and sometimes spectacular colours, it has for centuries captivated lovers of gems,...
The Munich Minerals Fair
Exhibition of minerals & gems in Saintes Marie-aux-Mines
Exhibition of minerals & gems in Saintes Marie-aux-Mines
Annemasse Haute-Savoie Exhibition of minerals
In the heart of Annemasse, the Minerals Salon invites you to dive into a fascinating world where each stone tells a unique story. Discover the magic of iridescent opals, exotic gems and natural treasures carefully selected for...
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