September 07, 2021
K & B Jewelry
As a salesman – I like to try to engage my customers. I can pull out my smart phone and show illustrations to immediately grab the customer’s attention and boost a conversation. Super good for those odd bits of detail.
February 18, 2019
Olga Jewelry
I am a gemologist and I won’t be using this for lab work. Of course in my lab I have everything I need. Still, a set of reference like this is extremely useful for guidelines when I am in the field. It appears you have incorporated the widest of ranges from all of the institutes. Great piece of work for today’s mobile world.
August 21, 2016
Suzy B
I’m going to Hong Kong and China for the first time to look for new sources for materials for my boutique line of jewellery. This material will be an invaluable aid.
November 19, 2015
Michiko Kodama
The diamond color comparison on page 6 is a masterful piece of work, extremely useful. We see all kinds of certificates.
October 12, 2015
E. Lynch
I like to be creative and dabble a bit with designing my own Jewellery. I measured the stones in a diamond ring and using JAM I was able to come up with a good approximation of the total diamond carat weight. I then converted and subtracted it from the total ring weight to get a good estimation of the weight of the gold. All of the information was there and easy to work with. I now need the diamond price multiplied by the carat weight and I need the gram weight multiplied by the appropriate price of gold and I will have a near exact evaluation of the cost of my ring. So quickly and easily done. Thank you. Good value.
June 03, 2015
Jenny Forster
This is an excellent tool and educational resources for professionals in the jewelry trade as well as novices. It’s a comprehensive compendium that will aid communication with suppliers and manfacturers in different countries, helping them to avoid pesky misunderstandings and technical glitches.
April 05, 2014
John S
When you do jewelry repair you see a lot of things. Consequently, you have to have a good set of reference materials. With this new reference e-book on my tablet I will see how many of my standard reference books I can permanently shelve.
March 18, 2014
Andrew Gallagher
Wow – what a collection. I put it on my phone and I will never have to take the time out to search for answers on the internet again.
December 16, 2013
Vinod More
A handy reference bible for every gem and jewellery professional!