Login
-
Recent Posts
- List of facts about tourmaline, an opinion
- No Paraiba in top ten list of most valuable/rarest or beautiful gemstones??
- #261 and a bright red cuprian smile
- Included bright sparkling red round. #261
- Getting threw the winter, 1/3 carat of fire
- The amount of lead in tourmaline.
- Color my world of tourmaline.
- Copper’s limited roll in coloring Paraiba/cuprian tourmaline.
Tags
- achroite
- afghan
- baby pink
- bi-color
- blue
- blue-green
- brown
- closed-c
- color-shift
- color dot
- cuprian
- cutting tourmaline
- dichroic
- dravite
- droplet-of-color
- emerald cut
- golden
- green
- green-blue
- hot pink
- IceT
- indicolite
- medium green
- Mozambique
- Namibia
- non-dichroic
- open-c
- orange
- outstanding
- oval
- pale
- pastel
- peach
- personal story
- pink
- purple
- purple-pink
- red
- rubellite
- seafoam
- shield
- unique
- verdelite
- yellow
- yellow-green
Recent Comments
- Romeo48065 on Laurellite a reverse color change tourmaline is unique.
- toadandspur on Outstanding Achroite with a Mystery
- Bruce Fry on Welcome to a World of Color in Tourmaline
- David Walsh on Paraiba/paraiba type tourmaline and treatments.
- rexguo on Laurellite a reverse color change tourmaline is unique.
Archives
- May 2019
- September 2018
- March 2018
- February 2018
- November 2017
- October 2017
- August 2017
- July 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- October 2016
- September 2016
- August 2016
- July 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
Tag Archives: chromophore
IVCT, intervalence charge transfer, dichroism in tourmaline.
I was searching threw my papers for tax time, when I ran across a copy of a personal email from George R. Rossman of Rossmanite and Caltech. I want to quote a paragraph on dichroism in tourmaline from that April … Continue reading
Posted in Etc., Tourmaline Analysis, Truth in Tourmaline
Tagged analysis, chromophore, composition, dichoic
Leave a comment
Laurellite a reverse color change tourmaline is unique.
I am sure that I have probably said too much about Laurellite on this site for some people, but questions have arisen and I wish to list the salient points about Laurellite that are important to appreciate it. 1, Laurellite … Continue reading
Posted in Laurellite, Tourmaline Analysis
Tagged analysis, chromophore, color change, cuprian, gemology, laurellite, spectrometry
8 Comments