Trusted Gemstone Experts from the Heart of Brazil

At the heart of Brazil’s rich mineral heritage, the Gemological Institute of Brazil brings together decades of combined expertise in geology, mining, gemology, and jewelry design. Our mission is to identify, evaluate, and curate the finest natural gemstones with scientific precision and artistic sensibility.

Whether you’re a collector, jeweler, investor, or simply someone who appreciates the beauty hidden beneath the earth’s surface, our multidisciplinary team is here to guide you with integrity, accuracy, and passion.

Our experts specialize in every stage of the gemstone journey — from responsible mineral exploration and rough gemstone extraction to advanced gemological analysis, cutting and refinement, and ultimately the creation of high-end jewelry pieces. This complete mastery of the production chain allows us to ensure authenticity, excellence, and ethical standards at each step, delivering gemstones and jewelry of unmatched quality.

With technical mastery, field experience, and aesthetic vision, we provide a comprehensive and reliable approach that gives every client clarity, confidence, and access to the very best of Brazil’s mineral treasures.

Caroline Müller

CEO & Founder

Caroline Müller is a highly skilled gemologist with a deep passion for the natural beauty and complexity of gemstones. With a particular expertise in emeralds, she specializes in the appraisal of gemstone lots, meticulously analyzing each stone to determine its authenticity, unique characteristics, and market value. Her detailed reports provide trusted verification and transparent insights, making her a respected authority for collectors, jewelers, and industry professionals seeking accuracy and integrity in gem evaluation.

Check the Authenticity of the Certificate

Verify the authenticity of your gemstone certification with our state-of-the-art validation platform. Simply enter your certificate details to instantly access secure, tamper-proof records backed by advanced technology. Our system ensures complete transparency and trust, giving you confidence that your gemstone has been accurately evaluated and responsibly certified.

Trade Shows

Research & Certification

Detailed documentation with scientific accuracy

At the Gemological Institute of Brazil, research and certification are at the core of what we do. Backed by decades of field experience and international credentials, our gemologists use state-of-the-art techniques to analyze and verify each gemstone’s origin, structure, and authenticity.

All certifications are carried out by GIA-certified experts and adhere to international gemological standards, ensuring credibility, transparency, and peace of mind for buyers, sellers, and collectors alike.

Team of Experts

Caroline Müller

CEO & Founder

Sweta Sahoo

Jewelry Designer & Entrepreneur

Júlio d'Alessandro

Geologist & Mining Executive

Reilly Santos McKinley

Specialist in Fine Natural Gemstones

Quotes & Reviews

Frequently Asked Questions

Yes. All certifications are conducted by GIA-certified gemologists and meet global standards accepted by buyers, jewelers, and institutions worldwide.

Not at all. While we have deep expertise in Brazilian gems, we evaluate gemstones from all regions of the world with the same level of precision, care, and technical excellence.

Absolutely. We work with secure international couriers to receive and return gemstones safely, accompanied by detailed tracking and insurance options.

Evaluation focuses on assessing a gem’s market value, while certification verifies its authenticity, treatment status, and origin. Both are often performed together for a comprehensive understanding.

Timelines depend on the volume and complexity of the stone, but most certifications and assessments can be completed within 1 hour, by prior appointment.

Contact Us

Have a question about a gemstone, need a professional evaluation, or want to speak with one of our certified gemologists? We’re here to help. Whether you’re a collector, jeweler, or industry professional, the Gemological Institute of Brazil offers personalized support and expert guidance.

Certification

Overview

A gemstone certificate is more than a document — it is your assurance of authenticity, credibility, and market value. In our Certification service, each stone undergoes a rigorous analysis using advanced equipment and internationally recognized methodologies. We evaluate optical properties, internal and external characteristics, treatments, probable origin, and all factors that influence its identity and quality.

The result is a clear, complete, and reliable certificate issued by qualified professionals and aligned with global gemological standards. This certification provides security for buyers, credibility for sellers, and peace of mind for collectors when negotiating or building their collections.

Evaluation

Overview

Gemological Evaluation is essential for determining the true value of a gemstone. During the process, we carefully examine the criteria that influence valuation — such as color, clarity, cut, weight, rarity, and market demand. We use high-precision instruments to ensure consistent and impartial results.

This service is ideal for those who want to understand a gemstone’s current value, prepare for a sale, confirm authenticity before a purchase, or safeguard their assets. You receive a detailed report that translates complex analysis into objective, clear, and easy-to-understand information.

Consulting

Overview

Gemological Consulting offers personalized guidance for those seeking safety and strategy when dealing with gemstones. Whether acquiring a stone, evaluating an opportunity, managing inventory, or making investment decisions, we provide technical and market insights tailored to your goals. Consulting may include comparative analyses, assistance in selecting pieces, pre-purchase verification, negotiation support, and clarification of specific questions.

This service is ideal for collectors, investors, jewelers, cutters, and buyers who want professional and impartial support. You gain clarity, confidence, and a specialized understanding of the gemological market.

Pricing

Overview

The Price List provides a clear and transparent overview of the costs associated with each service offered. Here, you’ll find the complete pricing structure for certification, evaluation, and consulting, allowing you to understand exactly what is included in each stage of the process.

Fees are determined based on the time required for analysis, the complexity of the material, and the technical resources involved—always following fair criteria and professional industry standards. This transparency ensures that you can plan your services with confidence, knowing precisely what you will invest in each type of appointment.

Caroline Müller

CEO & Founder

Caroline Müller is one of the most rare and complete professionals in the gemstones and jewelry sector in Brazil. She holds a Bachelor’s degree in Geology from the Federal University of Santa Catarina (UFSC, 2019), registered with CREA-SC under No. 2518327975, and earned her international education at the Gemological Institute of America (GIA), where she obtained the prestigious diplomas of Graduate Gemologist, Graduate Colored Stones, Graduate Diamonds, and Applied Jewelry Professional, as well as certificates in Diamonds Essentials, Jewelry Essentials, and Colored Stones Essentials.

Complementing her international training, Caroline is also a graduate of the Brazilian Institute of Gems and Precious Metals (IBGM), where she deepened her technical expertise and market knowledge through nationally recognized programs.

Her specialty lies in the gemological evaluation of gemstone lots, particularly emeralds, alexandrites and aquamarines, issuing technical reports that certify authenticity, gemological characteristics, and market value. Her work combines the scientific precision of geology, the gemological tradition of the GIA, and the strategic vision acquired through years of hands-on experience.

Caroline is the founder of Dohamu Joias, a family-owned company dedicated to the creation of exclusive and timeless jewelry pieces. She also provides specialized consulting services across Brazil, assisting jewelers, miners, and investors in gemstone acquisition, certification, and sales.

Her career includes remarkable experiences such as geological research in the Amazon rainforest, direct contact with miners and producers, and participation in some of the world’s most prestigious trade shows: the Tucson Gem & Mineral Show (USA), the Hong Kong Jewellery & Gem Fair, and Brazil’s leading fairs, such as FIPP and FENINJER.

In the gemstone trade, Caroline is recognized for offering exclusive and trustworthy access to miners and producers, ensuring her clients competitive prices, traceability, and unparalleled quality.

With a career marked by academic excellence, international exposure, field experience, and a privileged network of contacts, Caroline Müller has established herself as a unique, exclusive, and highly sought-after professional in the global gemstones and jewelry market.

Marcos Saraiva Araújo

Businessman in the mining sector | Military reserve officer

Marcos Saraiva is a businessman with a solid track record in the mining sector, with over two decades of experience in mining venture management and gem and mineral trading. He owns the companies Aricanga Mine, Ecomine Mineração, GCB Mineração, and Carsar Mineração, which focus on the extraction and sale of tourmalines, quartz, kunzites, and other high value-added minerals, operating in both the domestic and international markets.

Before devoting himself entirely to the private sector, Marcos joined the Brazilian Army, where he served as a second lieutenant in the infantry reserve, cultivating principles of leadership, discipline, and strategy that still guide his business activities today.

His work combines tradition, strategic vision, and a commitment to sustainability, seeking to add value to Brazil’s natural resources through good mining practices, recognized certifications (such as the RJC, currently in progress), and actions aimed at promoting Brazilian minerals on the global stage.

Sweta Sahoo

Jewelry Designer & Entrepreneur

Sweet Sahoo is a GIA-certified jewelry designer from London, with over 11 years of experience in creating luxury jewelry that blends artistry, technology, and precision. Her expertise spans both manual design, Procreate techniques and advanced CAD/CAM modelling using Rhino 3D and Matrix, enabling her to transform creative concepts into flawless, manufacturable pieces.

As the Proprietor of Donlon Gold and Managing Director at Lily Jewellery, Sweta has successfully managed end-to-end operations—design, production, sourcing, marketing, and client relations—while winning recognition such as the Best Jewellery Collection Award by 92.7 Big FM.

Her designs are inspired by beauty, symbolism, and cultural motifs, often incorporating precious metals and gemstones with a deep respect for craftsmanship. She is passionate about combining artistic vision with technical precision, ensuring each creation tells a story and meets the highest standards of quality.

Fluent in English, Hindi, and Odia, and open to global collaborations, she aims to bring my expertise to diverse markets, including Brazil, where she sees immense potential for creative exchange and innovation in luxury jewelry.

Júlio d'Alessandro

Geologist & Mining Executive

Júlio Rômulo Pessoa d’Alessandro is a geologist, entrepreneur, and passionate about transforming the land’s potential into real value. With over 20 years of experience in mining, he leads projects involving gold, iron, manganese, niobium, and rare gemstones such as alexandrite and emerald, always focusing on sustainability and global impact. 

Working with international investors, he connects mineral resources to innovative business opportunities, combining strategic vision, technical expertise, and a passion for revealing the hidden value of gems and minerals around the world.

Reilly Santos McKinley

Specialist in Fine Natural Gemstones

With years of hands-on experience in sourcing, evaluating, and dealing in the world’s finest natural gemstones, Reilly Santos McKinley has developed a specialist focus on natural ruby, Ceylon sapphire, Mahenge spinel, and tsavorite garnet. His expertise spans from precise gem identification and quality grading to strategic sourcing through trusted partnerships.

He maintains an established presence in Beruwala, Sri Lanka — a globally recognized hub for fine sapphires – where he works directly with local miners and cutters to secure exceptional, untreated stones of the highest caliber. This direct access to the source allows him to offer clients rare and investment-grade gems with complete transparency and traceability. His professional approach combines gemological precision with market insight, enabling him to recognize not only beauty and rarity, but also value and long-term investment potential. He is committed to ethical sourcing, authenticity, and delivering excellence to discerning collectors, jewelers, and investors worldwide.

Core Competencies:

  • Advanced knowledge of natural ruby, sapphire, spinel, and tsavorite garnet
  • Expertise in identifying untreated and high-value gemstones
  • Strong network in Sri Lanka’s gemstone trade (Beruwala)
    Market valuation and auction potential assessment
  • Ethical sourcing and industry transparency.