Category: Refractometers and Accessories

The refractometer measures the refractive index (RI) of a gem material. Safe and suitable for most polished gemstones, it is an invaluable gemmological tool –no gemmologist should be without one! With it, you can measure the minimum and maximum RI values, observe optic character and calculate any birefringence. We sell RI fluids which will take readings up to 1.81 and our refractometer comes with a built-in monochromatic filter (sodium yellow) for taking clear readings.

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Lesley Robinson
Lesley Robinson
2022-04-08
Verified
Sam was incredibly kind and helpful. They had everything we needed in the shop. My father drove from Spain to shop here and was delighted with his purchase s as I was with the service
Kerry Gregory
Kerry Gregory
2021-12-16
Verified
Every time I go to the shop, call up or ask advice I get exceptional service. Sam knows about every instrument, book and thing that is sold in the shop, she is happy to share her experience, knowledge and advice to help you get exactly what you need. She is incredibly helpful, always professional, and makes every interaction an positive experience.
Craig Smith
Craig Smith
2021-11-21
Verified
Professional, honest, and friendly service. Sam is fantastic; great product knowledge, very helpful, and up-to-date with the latest technology.
Studleys Jewellers
Studleys Jewellers
2021-11-18
Verified
Everything you need in one place! Excellent knowledgeable staff who are always very attentive and helpful.
Floriane Van Den Brande
Floriane Van Den Brande
2021-11-15
Verified
My experience with Gem-A Instruments has been excellent every single time. I’ve dealt with them on numerous occasions during the last couple of years both for me personally as also on behalf of A.E. Ward & Son. They have a large range of gemmological instruments, books and gadgets available. Instruments such as the refractometer and microscope which A.E. Ward bought from Gem-A years ago are absolutely invaluable and used daily. Sam is incredibly helpful and clearly very knowledgeable about everything stocked. She is always willing to explain something or give advice on any of the instruments and orders are prepared promptly. I highly recommend Gem-A Instruments!
Alicja Wooles
Alicja Wooles
2021-11-11
Verified
It is always great to see Gem A stand at all major jewellery events. The staff are always frinedly and extremly helpful. I have been using a lot of their equipment for years and they are still in great condition, which is the testimony to the quality. I did my FGA and DGA with Gem A and found the courses indepth and interesting.
Stuart Pool
Stuart Pool
2021-11-11
Verified
The Gem-A Shop is the first place I go when I have a requirement for new kit. The service is always superb and the advice and recommendations are invariably in line with what I need and the budget I can afford. I have bought many items from Gem-A and never had any cause for complaint.
David Clark
David Clark
2021-08-22
Verified
I have been in the jewellery trade for 20 years, but my quest for knowledge never ceases. I decided to undertake the Diamond Diploma (DGA) in 2020. A really interesting course, which covered every aspect of Diamond, and a really excellent practical Diamond Grading Week and exam. I am now delighted to have achieved my qualification and will proudly place the much coveted postnominals DGA after my name. One additional word of thanks goes to my tutor Valentina Molon, she was very very knowledgeable and offered superb guidance throughout the course.

Do you need any help? Feel Free To Ask

He is very professional and kind. He explained everything he needs. I love to work with him again and again. Great Experience.

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