You turn the stone. A flash appears. You turn it again—and the color seems to vanish.
Welcome to one of labradorite's most fascinating features. Its appearance can change dramatically as the relationship between the stone, your eyes and the light changes.
Meet labradorescence
The name for this iridescent flash is labradorescence. GIA describes colors that can include blue, green, gold, orange and violet. Light interacting with thin internal layers creates the effect. The flash depends on viewing conditions; it is not a color that stays equally bright from every direction.
Try a slow look
- Start with one light. Place the stone securely on a stable surface near a lamp.
- Change your viewpoint. Move your head gradually from side to side. If you handle the stone, support it securely and turn it slowly.
- Compare two views. Notice where the flash appears, then where it becomes less visible. You are exploring the angle rather than trying to change the stone.
What this means when shopping
A single still photo captures one lighting arrangement and one moment. Ask for a short movement video when a particular flash color is important to your choice. Different pieces can have different flash patterns, so don't assume a photograph of one specimen describes every piece in a listing.
Flash alone is not a complete identification or authenticity test. It is one feature to understand alongside the seller's material description and any supporting information.
Our pictured Labradorite Tower is one way to explore this mineral's changing appearance. Browse Crystal Cloud Company for a piece that rewards a second look.
Further reading: GIA's Guide to Phenomenal Gems and Optical Effects of Phenomenal Cabochons.