colinbm Posted November 6, 2020 Share Posted November 6, 2020 With some here showing beads & minerals, I decided to find some for myself.I have a local bead shop & fortunately a mineral display visited my local Mall.So armed the 'Wanfire' 365nm UV torch I ventured to these two outlets & spooked them with my UV expedition.By-the-way one of the no name UV torches has the brand as 'Wanfire', on eBay.The lady in the bead shop had never seen anything like it before, but only 1% of the glass & plastic beads were UV fluorescent.The mineral display was equally scarce with UV fluorescence, but I did get some nice examples that I could afford.The lady with the minerals was impressed with the 'Wanfire' & ordered one online. I did explain that they weren't 15w but still the best around. So here is the first posting by me in a long while......this is an Agate that has been 'colour treated'...?Not exactly sure what they do to the stone but I gather it has had some heat treatment to change its colours ? I took photos of the 'colour treated' Agate with three different wavelengths.First is in Visible light from a 6000k white LED.Second is in UVIVF from the 'Wanfire' 365nm LED torch.Third is a combination of UVIVF + Visible light. Link to comment
dabateman Posted November 6, 2020 Share Posted November 6, 2020 Its a way in which you polish the stone, if I can remember correctly.I used to tumble and polish stones as a kid. Look up Cat's eye stones. These aren't real, just a good polish to make it look that way. Probably cost too much to move my old Rock collection from Canada here to were I live now. But most likely I would have some treasures. I collected all across Canada during childhood camping trips. Link to comment
Stefano Posted November 6, 2020 Share Posted November 6, 2020 You can enhance the color of a gemstone with heat or exposure to ionizing radiation. https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.moregems.com/blogs/news/heat-treatment-of-gems%23:~:text%3DHeat%2520treatment%2520is%2520most%2520commonly,heated%2520to%2520lighten%2520its%2520color.&ved=2ahUKEwjg67rwle7sAhVuDmMBHXPzB7wQFjADegQIGBAF&usg=AOvVaw1emtRLj-akgcjp6EFxpCdQ&cshid=1604674589336 https://www.google.com/url?sa=t&source=web&rct=j&url=https://en.m.wikipedia.org/wiki/Gemstone_irradiation%23:~:text%3DThe%2520gemstone%2520irradiation%2520is%2520a,the%2520optical%2520properties%2520within%2520it.&ved=2ahUKEwjCydv6le7sAhVl4uAKHbDIC2cQFjACegQIARAE&usg=AOvVaw1NT9NTwX2tQaiwOljf6jaY&cshid=1604674447571 Link to comment
colinbm Posted November 7, 2020 Author Share Posted November 7, 2020 You can enhance the color of a gemstone with heat or exposure to ionizing radiation. https://www.google.c...d=1604674589336 https://www.google.c...d=1604674447571 Thanks Stefano, amazing processes. Link to comment
enricosavazzi Posted November 19, 2020 Share Posted November 19, 2020 Are you sure it is agate and not a piece of a thick seashell? Link to comment
colinbm Posted November 19, 2020 Author Share Posted November 19, 2020 Thanks EnricoThis business of heat & dye treating minerals is all new to me, but especially in the last two images I can see the Agate properties coming out...?I did a Mohs Test & I was just able to scratch glass.Col Link to comment
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