Nicole Cortinez is a seasoned and certified independent gemologist with over 16 years of hands-on experience in the examination, grading, appraisal, and authentication of precious and semi-precious gemstones. With an unwavering commitment to accuracy, transparency, and industry best practices, Nicole has established herself as a trusted authority in gemology, working with an elite clientele that includes private collectors, high-end jewelers, auction houses, museums, and luxury brands worldwide.

Nicole holds a Graduate Gemologist (GG) diploma from the Gemological Institute of America (GIA), an Accredited Gemologist (A.G.) certification from the American Gem Society (AGS), and is a Fellow of the Gemmological Association of Great Britain (FGA)—three of the most respected credentials in the field. Her expertise spans diamonds, colored stones, pearls, and rare gem varieties, with specialization in origin determination and treatment detection through advanced gemological instruments and laboratory techniques.

Throughout her career, Nicole has conducted independent appraisals for insurance, estate, legal, and investment purposes, and frequently provides expert opinions in matters involving gemstone authenticity and value. She is known for her meticulous attention to detail, scientific rigor, and discretion in handling high-value transactions.

Nicole is also an active participant in international gem shows and conferences, and remains engaged with ongoing developments in gemological research. Her work is characterized by a blend of academic insight, field experience, and a passion for the natural beauty and history of gemstones.

Whether serving as a consultant for bespoke jewelry projects, verifying stones for auction listings, or educating clients about ethical sourcing and market trends, Nicole Cortinez delivers excellence and integrity in every aspect of her profession.