[PDF][PDF] Phase transformation of epigenetic iron staining: Indication of low-temperature heat treatment in Mozambique ruby

T Sripoonjan, B Wanthanachaisaeng… - J …, 2016 - gidlaboratories.com
In the past several years, Mozambique has emerged as one of the world's most important
sources of ruby, and unheated stones from this country are in particularly strong demand …

[PDF][PDF] Identifikácia tepelnej úpravy prírodných korundov pomocou hydroxid hlinitých inklúzií

J Štubňa - Gemologický spravodajca, 2017 - researchgate.net
There are many methods for improving color and purity, such as heat treatment. Observation
of dissolution of inclusions is one of the important indicators by which corundum heat …

[PDF][PDF] Identification of Colourless HPHT-grown Synthetic Diamonds from Shandong, China

Z Song, T Lu, S Tang, J Ke, J Su, B Gao… - The Journal of …, 2016 - academia.edu
Colourless HPHT-grown synthetic diamonds are becoming more common in the
marketplace. The authors recently studied 20 samples weighing 0.06–0.67 ct from a …