Out of Stock
The detection of irradiation and HPHT enhanced natural and synthetic diamonds requires advanced testing equipment such as the GL Gem Spectrometer and GL Gem Raman PL532.
Equally important for gem identification are reference sets of samples which have been properly identified and can be used for testing procedures. They are also excellent references for personal training using simplified methods such as polariscope, microscope and the gemmological hand spectroscope.
We offer the following HPHT study collection with a total weight of 1.19 ct; these diamonds have been prepared by the Canadian Gemological Laboratory (CGL), Vancouver, B.C. and will be dispatched directly upon receipt of payment.
|0.20 ct||brown||natural colour|
|0.15 ct||colourless||HPHT (type II)|
|0.19 ct||pink||multistep HPHT (type I)|
|0.17 ct||yellow||HPHT (type I)|
|0.17 ct||orange||HPHT (type I)|
|0.14 ct||apple green||HPHT (type I)|
|0.17 ct||green||multistep HPHT (type I)|
This item must be pre-ordered by making a deposit by certified cheque or direct bank transfer payable to our Canadian bank; please request pro forma invoice at checkout for total amount and shipping charges. We cannot accept payment by credit card for this item.