Pleochroism in an iolite cut stone
This iolite (magnesium aluminium silicate) is displaying pleochroism, a varied colour effect as the gem is turned. See also 3960
Picture No
10705050
Media ID
47571995
Size
3543px x 2634px
(4.1MB)
Credit
Mary Evans / Natural History Museum
Source
Photograph from the Natural History Museum Collection
Pick your License
Aluminium Aluminum Cordierite Corundum Cyclosilicate Gemstone Hematite Iolite Magnesium Mineral Oxide Pleochroism Sapphire Silicate Sparkle Sunstone
Features In These Collections
> Contributors > NHM
