by guadmin | May 24, 2024 | Knowledge Base
What are the cobwebs in sapphire? Diffusion treatments can be divided into surface diffusion and body diffusion Surface diffusion: Chromogenic compounds are added at high temperatures to improve the color of the stone. However, the chromogenic elements (Fe and Ti)...
by guadmin | May 24, 2024 | Research
Recently, Guild Gem Laboratories received a 10.48 ct sugarloaf emerald (figure 1) for identification and origin determination. The refractive index (approximately 1.58) and specific gravity (approximately 2.80) fell within the range for beryl, and Fourier-transform...
