Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
Posted: Sat Mar 21, 2015 12:30 am
Site Admin
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21600 Location: San Francisco
Welcome, MeaningfulGemstone! I'm glad you stumbled on our forum. Lots of useful info already posted, and if you find anything we've overlooked, just ask.
Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
Posted: Thu Aug 20, 2015 10:32 am
Gemology Online Veteran
Joined: Thu Mar 19, 2015 9:55 am Posts: 543
Another very useful aspect of the Zelco is that there are LED bulbs that fit directly in the holder. Even more brightness but longer battery life and if you need the incandescent spectrum the bulb can be switched back in seconds. A good buy.
Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
Posted: Wed Oct 04, 2017 7:57 am
New to the Forum or The Quiet Type
Joined: Sat May 13, 2017 6:58 am Posts: 2
Thank you so much for this site and for these videos! I can not tell you how much difficulty I am having with the spectroscope. I can not find the flexible light she is using. Can you recommend something else? Many thanks!
Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
Posted: Wed Oct 04, 2017 12:01 pm
Gemology Online Veteran
Joined: Thu Mar 19, 2015 9:55 am Posts: 543
My Zelco came with a GIA pocket kit, perhaps you could try them. On the other hand try with a flashlight, you should still be able to find an incandescent model about (try Maglight), but remember to use some blue tack to block out all extraneous light.
Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
Posted: Wed Oct 04, 2017 7:23 pm
New to the Forum or The Quiet Type
Joined: Sat May 13, 2017 6:58 am Posts: 2
Holy Absorption lines Batman! Putty on the Mag Light. Never in a million years would I have thought of that. I have tried it and I still need to work on my technique, but boy is that a tremendous help. Many, many thanks!
Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
Posted: Thu Aug 30, 2018 9:30 am
New to the Forum or The Quiet Type
Joined: Wed Aug 29, 2018 4:18 pm Posts: 2
Hi friends! I have bought the chelsea filter from China. But I can't understand whether it works. I have a natural blue sapphire and synthetic red ruby, but I can't see any reaction under the filter! I'm not having any emerald now. Or all my gems are fake, or the filter does not work? Of course I have read how to use it, but I have the troubles. This filter is almost opaque, is it right? Are there some methods to understand whether the filter is fake or not? Thanks!
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