Contact Info

Get A Quote

Meet Our Founder

Under the leadership of founder, Theresia Koepp LustreStone Lab is a prominent provider of premium gemstones and diamonds.

Founder & Chief Gemologist, LustreStone Lab

Theresia Koepp

Theresia Koepp is a distinguished gemologist and the visionary founder of LustreStone Lab, a premier gemological laboratory dedicated to scientific precision and ethical excellence in the gemstone industry. With over 15 years of experience in gem identification, diamond grading, and gemstone consultation, Theresia is widely respected for her deep technical knowledge and unwavering commitment to industry standards.

She holds multiple elite certifications in gemology, including:

Certifications

CGraduate Gemologist (GG) – Gemological Institute of America (GIA) Fellow of the Gemmological Association (FGA) – Gem-A, The Gemmological Association of Great Britain Accredited Jewelry Professional (AJP) – GIA Applied Jewelry Professional Diploma – GIA Coloured Stone Grading Certificate – Swiss Gemmological Institute (SSEF) Diamond Grading Certificate – International Gemological Institute (IGI)
img