Phenomenal Gems – Unique Phenomena in Gemstones
Step 5: Advanced Gem Information
What Are Phenomenal Gems?
Some optical effects in gemstones, such as color, brilliance, dispersion, and birefringence, can be quite impressive. However, not all optical effects are considered phenomenal. A few gems do things with light that may seem magical. These are called phenomenal gems. Some of the most well-known examples in this category are opals with their fabulous play of color, alexandrites that change color, and star sapphires. This article covers these …