A recently published article by SSEF and co-authors in the Journal of Gemmology examined applications of DNA fingerprinting of pearls, corals and ivory as a method in gemmology.The full article can be downloaded here....
SSEF has conducted an extensive research project to establish more specific criteria to detect low-temperature heat treatment, studying more than 200 unheated and heated rubies (rough and faceted stones) from Mozambique. In combination with close microscopic examination of the samples, specific infrared spectroscopy (FTIR) peak...
We will be giving a presentation updating the trade on new gemstone finds on September 15th in the afternoon, which you are cordially invited to attend. Please see below for further details. Dr. Michael S. Krzemnicki, director of SSEF, will be giving a presentation on the...
We will be in Hong Kong 07 – 18 September offering our on-site testing services, during the September Hong Kong Jewellery and Gem Fairs. Equipped with our mobile instruments and spectrometers, we will be testing coloured gemstones at the Asia World Expo (12 – 16...
We will be in Bangkok 20 - 24 August 2018 offering our on-site testing services. Our office is in the gem trade district at the Silom Road. Equipped with our instruments and spectrometers, we will be testing coloured gemstones. Please contact us to make an appointment. More...
We will be in Hong Kong 18 – 24 June offering our on-site testing services, during the June Hong Kong Jewellery and Gem Fair. Equipped with our mobile instruments and spectrometers, we will be testing coloured gemstones at the Convention & Exhibition Centre (21 –...
We will be in Bangkok 21 - 25 May 2018 offering our on-site testing services. Our office is in the gem trade district at the Silom Road. Equipped with our instruments and spectrometers, we will be testing coloured gemstones. Please contact us to make an appointment. More...
SSEF is honoured to take part in the upcoming first edition of the GemGenève show at Palexpo in Geneva. We will be offering coloured gemstone express testing services at our booth B7-1. Further, Dr. Michael S. Krzemnicki will be giving a talk during GemGenève, details of...
During BaselWorld 2018 (22 - 27 March), SSEF will be offering its convenient gemstone and pearl testing services. You can find us in the first floor of Hall 3 at booth No. 3.0/ E23, at a different location than in past years. The phone number at...
Padparadscha-like fancy sapphires with unstable colours from Madagascar. Fancy sapphires recently found in Madagascar showing an unstable colour, shifting from pinkish orange (padparadscha-like) to pink after a fading test are reported. Read Report (PDF)...