| Page title | Browse gemstones by Phenomena: Change of color (Alexandrite effect) |
| Author | David Weinberg |
| Website title | Alexandrite Tsarstone Collectors Guide |
| Date published | 03 July 2010 06:05 UTC |
| Date accessed | 22 May 2013 18:46 UTC |
| Permanent link | http://www.alexandrite.net/viewpage.html?id=ALXS-011-00001 |