Events and Hosted Tours

Tours of interest for serious jewelry and gemstone professionals and devotees have been personally hosted by Charles Carmona for over 15 years. These rich experiences at important gem producing sites around the world have provided invaluable insight and knowledge to the tour members.

There is simply no better way to comprehend the world of natural gemstones than by joining Mr. Carmona on one of his personalized expeditions.

In the past, Mr. Carmona has led groups to various mining sites in the Southwest United States; Arizona, Nevada, New Mexico, Utah and California. His customized tours to exotic locales like Sri Lanka, Thailand, Brazil, Madagascar, Colombia, and to the gem carving center of the world, Idar Oberstein Germany have produced memories that last a lifetime, and have enriched each tour member with incalculable hands on knowledge.

Take a look at some candid photo albums from previous tours to Sri Lanka, Thailand, Brazil, Colombia and Madagascar, to get an insider's look at Mr. Carmona's custom tours.

Please bookmark this webpage and visit often to learn about upcoming events hosted by Mr. Carmona.

Gemstone Weight Estimation

This thoroughly comprehensive manual does the difficult task of estimating carat weights of mounted gemstones, calculated by their dimensions and shape, with over 300 pages of tables listed, and gemstone type.