Jan. 2011 – Diffusion Patents Follow-up

-Lisa Brooks-Pike

After our article “Path to Diffusion” we were graciously contacted by Dr. Karl Schmetzer making us aware of the work he had done previously, which we had not discovered before writing the article. Dr. Karl Schmetzer has written three important and detailed papers regarding various diffusion patents which were published in the Journal of Gemmology. With the kind help of Dr. Schmetzer and Mary Burland of the Gem-A, we were able to obtain links to these articles and permission to share them with our members. Continue reading

Jan. 2011 – The Path of Diffusion

-Lisa Brooks-Pike

When I began looking seriously at Andesine in early 2006, the thought that anything other than sapphire could be diffused was considered ridiculous, and impossible. By the Tucson Gem Show in 2008, I had collected enough samples, information, and evidence suggesting not only that it was possible, but it was happening. I turned the information, evidence and samples over to Robert James of the International School of Gemology for testing, and the rest, as it were, is history. Continue reading