El Salvador Jewellery.
By Aamir Mannan.
ALMANDINE GARNET (IRON)
The spectrum of almandine is one of the easiest to see and to recognize.With zircon, it shares the distinction of being the first gemstone in which dark bands were observed and recorded.This was in I866 when Sir Arthur Church wrote an account of his discovery in a letter to the Intellectual observer.
The main feature of the almandine spectrum is the presence of three broad, strong bands in the yellow (5760 A),green (5270), and blue green (5050). There are several weaker bands, notably one in the orange (6170) and one in the blue (4620). Of the three main bands,the one at 5050 A is the most persistent, and can be faintly seen in almost
all pyropes, as described here under, also in many spessartite garnets, especially those from Ceylon. Almandine has no fluorescence.
By Aamir Mannan.
The spectrum of almandine is one of the easiest to see and to recognize.With zircon, it shares the distinction of being the first gemstone in which dark bands were observed and recorded.This was in I866 when Sir Arthur Church wrote an account of his discovery in a letter to the Intellectual observer.
The main feature of the almandine spectrum is the presence of three broad, strong bands in the yellow (5760 A),green (5270), and blue green (5050). There are several weaker bands, notably one in the orange (6170) and one in the blue (4620). Of the three main bands,the one at 5050 A is the most persistent, and can be faintly seen in almost 
all pyropes, as described here under, also in many spessartite garnets, especially those from Ceylon. Almandine has no fluorescence. 
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