Chelsea filter

id: chelsea-filter-238-9943217
title: Chelsea filter
text: In gemmology, a Chelsea filter is a dichromatic optical filter used for identifying coloured stones.
brand slug: wiki
category slug: encyclopedia
description:
original url: https://en.wikipedia.org/wiki/Chelsea_filter
date created:
date modified: 2017-02-08T18:06:55Z
main entity: {"identifier":"Q5090153","url":"https://www.wikidata.org/entity/Q5090153"}
image:
fields total: 13
integrity: 13

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