Sapphirine was so named because of its resemblance in color to blue sapphire, even though the two minerals have completely different chemical, optical and physical properties. Sapphirine is very rare, with small gems only faceted for collectors. This gem is know for blue color, but occasionally forms in a red-orange variety.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Color due to iron This strongly pleochroic rare mineral is typically too dark to transmit sufficient light to observe the spectrum. It is in the polarized dark ray that the main feature is seen due to the high ferric iron content present as a strong line at 445nm. The weaker absorption at 550nm. is possibly due to ferrous iron. The yellow is absorbed followed by weak transmission then total absorption from about 620nm.
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; United States of America (the); Unknown; Norway; Sri Lanka; Italy; Madagascar; France; Greenland