Axinite is an uncommon mineral that usually occurs in long, flat, axe-shaped crystals, a trait that makes it highly desirable to collectors who enjoy adding various crystal forms to their collections. Its strong trichroism only adds to its special appeal. As it is rotated, different colors are displayed, including rich cinnamon browns, violets, blues or greens.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Color due to iron. Two broad bands are seen in the deep blue at 444nm. and 466nm. with four bands in the blue-green with the broadest at 492nm. As pleochroism is usually very strong it is advisable to use a polarizing filter to avoid the strong absorption in the darker violet and reddish-brown directions.
We acknowledge the significant scientific contributions of John S Harris, FGA to the study of gemstone spectra and with deep appreciation to him, acknowledges the use of his images and related notes about gemstones and their spectra in the educational materials on this website.
Countries of Origin
Canada; Russian Federation; Pakistan; Unknown; Brazil