The Gemologist
Melissa Gann
Graduate Gemologist, GIA - Former Special Agent, OSBI
Melissa Gann spent 14 years as a Special Agent with the Oklahoma State Bureau of Investigation. She investigated homicides. She built cases from physical evidence, witness accounts, and forensic detail. She learned, in the most demanding professional context imaginable, how to look past the surface of things.
When she took early retirement from the OSBI, she pursued the field she had been drawn to for years: gemology. She completed the requirements for the Graduate Gemologist credential from the Gemological Institute of America - the most rigorous gemological qualification in the world - and founded Gann Diamonds and Appraisal Services.
The name of her background is unusual for this industry. The skills it produced are not. The discipline to evaluate carefully, the instinct to question what is presented at face value, and the commitment to finding the truth beneath the surface are exactly what gemological work demands.
Training and Credentials
The Graduate Gemologist (GG) designation from the GIA is the gold standard in gemological education. Earning it requires completing a comprehensive curriculum covering diamond grading, colored stone identification, gem laboratory procedures, and the science of light behavior in gemstones - along with extensive hands-on evaluation work under professional conditions.
It is not a certification that can be acquired quickly. It requires years of study, thousands of hours of practical work, and a level of detail that most people who work in retail jewelry never reach. Melissa holds that credential. It is the foundation of everything she does in the studio.
What That Background Means for You
When Melissa evaluates a stone for a client, she is not reading a certificate out loud. She is conducting an independent assessment - examining the stone under controlled gemological lighting, checking its dimensions, evaluating its cut performance, assessing its clarity characteristics in person, and verifying that what the documentation claims matches what the stone actually is.
That matters because certificates have limits. Grading laboratories assess stones under their own conditions at a specific point in time. What a stone looks like in everyday light, how it performs face-up in the setting you are planning, whether its inclusions are truly invisible to the naked eye - these are questions that require a trained eye looking at the actual stone, not a number on a report.
Melissa closes that gap. She is the person in the room who knows what the stone is doing and why, and who can explain it in plain language without a sales agenda attached.
A Note on How She Works
Gann Diamonds takes on a deliberately limited number of commissions at a time. This is not a constraint. It is a professional standard. Every client who works with Melissa gets a gemologist who is fully present for their project, from the first consultation to the moment the finished piece is delivered.
The studio does not rush. It does not oversell. It does not tell clients what they want to hear when what they need to hear is different. That approach is a direct product of 14 years spent in a field where accuracy was not optional.
I spent my career learning how to find what is actually there, not what someone wants you to see. That is the only way I know how to work.
Melissa Gann - Graduate Gemologist, GIA
Recognition and Community
Melissa is an active member of the professional jewelry and gemology community. Her transition from law enforcement to gemology - and the integrity she brings to both - has earned recognition among peers and clients alike. She approaches the work with the same standards she brought to the OSBI: methodical, honest, and uncompromising in what she is willing to put her name on.
Work with Melissa - Schedule a Consultation
Gann Diamonds - Private Design Studio - Oklahoma - By Appointment Only