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How to use color filters for testing gems


#1

How do you use a red ruby filter to test for different stones? Thanks.


#2

Well first of all, ruby as well as Chelsea filter are basically the same item marketed under a different trade name.

You can really use such a color filter for many different tests of different gems, not just Rubies. There are ‘potential resulting lists’ of what you should see with/without such a filter floating around, just search Google. However I would recommend not to take such a result as a primary mean, you should always confirm through other means


#3

Im curious on your take on hanneman filters.

Do you need them to identify tanzanite?

And how about sapphires?

Under my chelsea filter I have 2 sapphires that appear green.

And the tanzanite under the same filter is a gold/brown.

Im basically asking if I should buy the tanzanite filter along with the ruby/aqua set.

Any input is appreciated.