Research entry · template · Gemology & Science
ET-0001 Spectral Record
This entry is a template. It demonstrates how spectra, element tables and laboratory downloads will be presented once sample ET-0001 has been analysed.
- By
- Paraiba Ethiopia Editorial Team
- Reviewed by
- Review pending
- Updated
UV-Vis-NIR spectrum
Demonstration curve only. A measured spectrum will replace it after laboratory analysis.
UV-Vis-NIR absorption — demonstration template
Demonstration data- ~520 nm Mn³⁺-related region · Literature (general)
- ~700 nm Cu²⁺-related band · Literature (general)
- ~900 nm Cu²⁺-related band · Literature (general)
Chemical analysis
Element values are pending.
Chromophore and trace-element panel — template
Template — no values yetPrincipal chromophore discussed for blue to green colour in Paraíba-type tourmaline
Pending · ppmw · LA-ICP-MS / EDXRF
Mn³⁺ can add pink–violet components; Mn²⁺ is largely colourless
Pending · ppmw · LA-ICP-MS / EDXRF
Can shift colour toward darker blue or green and reduce brightness
Pending · ppmw · LA-ICP-MS / EDXRF
Participates in charge-transfer interactions with Fe in some tourmalines
Pending · ppmw · LA-ICP-MS
Trace element sometimes used in origin discrimination
Pending · ppmw · LA-ICP-MS
Trace element sometimes used in origin discrimination
Pending · ppmw · LA-ICP-MS
Downloads
- Laboratory reportPDF · not yet published
- Raw spectrum dataCSV · not yet published
Author
Paraiba Ethiopia Editorial Team
The editorial team researches and writes Paraiba Ethiopia’s educational content on copper-bearing tourmaline, prioritising laboratory nomenclature and published gemological literature over trade claims.
Technical reviewer (assignment pending)
Independent gemological reviewer
Placeholder. A qualified gemologist will be named here once technical review of this page is complete. Until then, treat technical statements as editorially prepared but not yet independently reviewed.
First published 1 October 2026. Read our editorial policy