Fall for Autumn Gems
Nature gives us a brilliant palette of color-changing leaves and a spectacular kaleidoscope of colorful sunsets during the fall season.
The Natural Formation and Occurrence of Green Quartz
How amethyst under certain conditions may turn green rather than the expected citrine-yellow.
Artificially Induced Color in Amethyst-Citrine Quartz
A new and rather unusual gem material and possible treatments are discussed.