Gemstone testing

Identifying and advising

At Marcus McCallum, we take pride in offering gemstone testing for the trade. Our experienced team of FGA gemmologists is dedicated to helping you identify and understand your precious stones. With our expertise and passion for gemmology, we provide accurate and valuable information about your gemstones.


Knowledge sharing

Gemstones are not just our profession, but also our passion. Our gemmologists stay updated with the latest developments by studying literature and attending relevant events. We love engaging in discussions and answering your questions, whether you’re a seasoned professional or new to the world of gems and jewellery.

Our gemstone testing service provides invaluable information about your gemstones for £15 per item.



Giving back

We proudly support Action for Kids, a charity benefiting children and young people with disabilities. Two-thirds of our fee goes directly to this worthy cause. By choosing our services, you contribute to a meaningful charitable endeavour.


Investing in tomorrow

The remainder of the testing fee isused to maintain and upgrade our testing equipment, ensuringaccurate and reliable gemstone testing. We value technology in gemmology to provide you with the highest level of service.



Further services

While we don’t issue certificates ourselves, we can arrange certification services if needed. Contact us for more information.

We are an advisory service, not a lab. We offer expert guidance and professional opinions based on our testing process. Our goal is to deepen your understanding of your gemstones, their characteristics, and value.

For accurate gemstone identification and expert advice, trust Marcus McCallum’s gemstone testing service. Our experienced team of gemmologists is ready to assist you and share their knowledge. Reach out to us today to discuss your gemstone testing needs.