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References (6)
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W. White, R. Roy, J. Crichton (1967)
The “Alexandrite Effect”: And Optical StudyAmerican Mineralogist, 52
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Schmetzer Schmetzer, Bank Bank, Gübelin Gübelin (1980)
The alexandrite effect in minerals: chrysoberyl, garnet, corundum, fluoriteNeues Jahrbuch für Mineralogie Abhandlungen, 138
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E. Gübelin, K. Schmetzer (1982)
Gemstones with Alexandrite EffectGems & Gemology, 18
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Helson Helson, Judd Judd, Warren Warren (1952)
Object‐color change from daylight to incandescent filament illuminationIll. Eng., 47
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C. Poole (1964)
The optical spectra and color of chromium containing solidsJournal of Physics and Chemistry of Solids, 25
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(1974)
Chromium III Centers in Synthetic Alexandrite
- Publisher
- Wiley
- Copyright
- Copyright © 1994 Wiley Periodicals, Inc., A Wiley Company
- ISSN
- 0361-2317
- eISSN
- 1520-6378
- DOI
- 10.1002/col.5080190306
- Publisher site
- See Article on Publisher Site
Abstract
The term “alexandrite effect” is used in gemology to describe a distinct change of color appearance when a gemstone is switched from daylight to incandescent light. Gemstones that exhibit the alexandrite effect can actually be divided into four categories based upon the value of the calculated absolute hue‐angle change of the material under different pairs of illuminants. the alexandrite effect is a non‐color‐constancy phenomenon. It can be explained by a combination of both chromaticity adaptations to the different light sources, and vision system responses to the spectral distribution of the light emitted by alexandrite effect gemstones when they are illuminated alternatively by the different light sources.
Journal
Color Research & Application – Wiley
Published: Jun 1, 1994