Amethyst under polarized light Product:Greetings card circa 1953

circa 1953

'Founded on the legend of Banbury Cross

He is holding out a paper

South-east view of Lambeth Palace from the churchyard

Amethyst under polarized light Product:Greetings card circa 1953Sixteen 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