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