Amethyst under polarized light Product:Greetings card it was converted to a

it was converted to a railway tunnel for the East London Railway in the 1860s

and the new nomenclature of DUMAS

'Founded on the legend of Banbury Cross

circa 1953

He is holding out a paper

Amethyst under polarized light Product:Greetings card it was converted to aSixteen figures showing specimens of amethysts viewed under polarized light and exhibiting veined structures. Brewster notes in his text: 'The observations are the result of an immense variety of experiments, which accidental circumstances put it in my power to make upon this interesting mineral. Having access to whole bagfuls of amethystine pyramids from the Brazils, in the possession of Mr Alexander, lapidary in Edinburgh, I have examined some