Scottish Gemmological Association

As ever, we are very grateful to our Sponsors for their continuing support of our annual Conference.


Gem-A is a registered charity. As the world's longest established provider of gem education, they are committed to promoting the study of gemmology and providing continuous professional to their members.

Established in Hatton Garden in 1984, Marcus McCallum specialises in supplying rare and unusual stones to the trade. They also have a constantly-changing stock of pearls and beads.

Marcus personally sources his stock from prime contacts around the world drawing on relationships with dealers and cutters forged over twenty-five years. Regular visits to Brazil, India and Sri Lanka ensure a constantly updated range of particularly fine and unusual stones. His extensive stock of freshwater pearls, especially selected in Hong Kong and the Far East, encompasses all shapes and colours whilst his range of semi-precious beads is one of the most exciting and wide-ranging in the UK.


Alistir Wood Tait is a jeweller and gemmologist, and has been prominent in Edinburgh's jewellery establishment for more than 30 years. His shop is a haven for lovers of beautiful things and the displays reflect the unique nature of Alistir's stock.  Each of his staff is a specialist in their own field and all bring their love and enthusiasm for gems and jewellery to their customers and clients.


C.W. Sellors are a specialist independent luxury jewellery retailer and manufacturer established in 1979, with 14 jewellery and watch boutiques along with leading e-commerce jewellery and watch websites. Their dedicated team are passionate about their fine handmade jewellery and luxury watches.

Specialising in diamonds and coloured gemstones, Whitby Jet and Blue John, they also stock a huge selection of unique contemporary jewellery and watches collections, with a design team on hand to discuss any custom or bespoke jewellery designs.

As official stockists of the brands on offer you can buy safe in the knowledge their dedicated team will be on hand to offer great service and aftercare support.


The Jewellery Appraisers of the World Directory brings you the best professionals in your area. All the valuers and gem labs featured on JAW are full-time professionals whose principal business activities are jewellery appraisal, valuation, gemstone identification and diamond grading.

For your further protection, all JAW Associates featured on this directory have had their qualifications and memberships checked and verified. This ensures that your jewellery, diamonds, gemstones and watches receive the very best analysis and that you obtain an appraisal and valuation report that has been produced with expertise and pride.

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T H March are best known as the foremost brokers for the jewellery trade, offering a wide range of products and are experienced in meeting the insurance needs of retailers, designers, manufacturers, makers, collectors, repairers and wearers, who are all part of the UK’s diverse and vibrant jewellery scene.

T H March also offers a wide range of commercial and personal insurance products to suit the needs and requirements of all kinds of people and organisations. Insurance cover for your business, home, your life, health or any other precious possession.


Established in 1974 by Antonio "Tony" Bonanno (as alumnae of the Gemmological Association of Great Britain), AGA was envisioned as a network for sharing gemological information and skills. Graduate gemologists of the Gemological Institute of America joined in 1975. The international Accredited Gemologists Association of today proudly counts among our members some of the worlds leading independent gemologists.

The AGA is an independent, international, nonprofit organization dedicated to...

Gemological Education & Research
Identification & Evaluation of Gem Materials
Development of Professional Standards of Analysis, Practice & Ethics

We are an organization of all beliefs and cultures and share a common bond of the love of gemstones. AGA believes in excellence and is dedicated to establishing the highest professional standards of practice.

Founded in 1977, and located in the heart of New York's gem and jewelry district, American Gemological Laboratories (AGL) is an international gemstone testing facility specializing in comprehensive colored gemstone analysis. AGL provides detailed identification and enhancement reports, country-of-origin reports, as well as complete colored stone analysis documents tailored to gems of unique importance.


The Canadian Gemmological Association is a not-for-profit corporation that was established in 1958 to provide a Canadian source for gemmological education and to act as a medium for communication and co-operation among those involved in all aspects of gemmology.

Their mandate includes the dissemination of knowledge and information, and the promotion of high ethical and professional standards within the sector.

BKT Rings Ltd is a family firm producing an extensive range of jewellery suitable for the independent retailer - traditional and modern designs in 9ct and 18ct, set with diamonds and coloured gemstones.

TJW Diamonds Ltd is a family firm specialising in antique and second-hand jewellery. We sell rings, brooches, pendants, earrings, alberts, bracelets, pocket-watches, cufflinks, necklaces, fobs, etc. We are always looking to buy second-hand jewellery and welcome enquires, whether for buying or selling.




Bonhams is a privately owned international auction house. Founded in 1793, it is one of the world's largest and most renowned auctioneers of fine art and antiques, motor cars and jewellery.

Today, operating out of its major salerooms in London, New York, San Francisco, Hong Kong and Los Angeles, Bonhams conducts some 400 annual sales through its sixty specialist departments. The same guiding principles have ensured Bonhams' success over the past two centuries.

With specialists in every major area of art and collectables, the depth of collective knowledge of Bonhams auctioneers has enabled the company to challenge the market positions of Sotheby's and Christie's. In 2009 Bonhams announced that it had taken market leadership in ten key areas of the UK art market for the first time including Antiquities, Arms and Armor, Watches and Clocks, Motor Cars, European Ceramics and Japanese art.