Colour Filters: Useful tools that gemologists should use but often don’t


Written for industry specialists, this article challenges the conventional approach to the teaching of Colour Filters, which tends to view them as an entirely separate tool and learning concept. I suggest this could be improved and doing so would empower students with a deeper understanding of the filtering of light, and the wider influence of transitional elements, while also bettering theĀ understanding of the graphic output of spectroscopic data, and the concepts of absorption and emission. Students often struggle to relate what they see through a colour filter with what they see in a graph.Ā 

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