Accessibility options

Switch to preferred accessibility theme:


Increase or decrease the text size:

  • Internet Explorer: View > Text Size > Largest

Keyboard navigation and access keys:

  • A - Accessibility options
  • 0 - Skip navigation
  • 1 - Home
  • 2 - Alexandrite chapters
  • 3 - Alexandrite directory
  • 4 - Alexandrite forums
  • 5 - Alexandrite gemstones
  • 6 - Alexandrite localities
  • 7 - Contact information
  • 8 - About Alexandrite Guide
  • 9 - Sitemap
  • Press ALT + Access Key, then ENTER.

Close

Alexandrite

Tsarstone collectors guide


Thermochroism

Thermochroism
The science of high temperature of one subject to change its color, because by increasing of temperature expands the bond length of lattice, reduced the ligand field. A red compound of 10% Cr2O3 and 90% Al2O3 by increasing the temperature to over 400 C the color turn to gray and a little about 400 C to green. Thermochroism seen both in both reversible and irreversible. Thermochroism seen in organic compositions combined with color change when the ligand field is in transfer with metal ion and when temperature change. the color change is reversible in solution such as yellow anil dye to red anil dye by heat, but in the solid, the change may remain permanent on cooling.
Thermolumnescence
Thermolumnescence
m.alexandrite.net/chapters/glossary/thermolumnescence.html
Translucent
Translucent
m.alexandrite.net/chapters/glossary/translucent.html
Transparent
Transparent
m.alexandrite.net/chapters/glossary/transparent.html
Trichroism
Trichroism
m.alexandrite.net/chapters/glossary/trichroism.html

Tags

alexandrite alexandrite classification alexandrite crystal alexandrite deposit alexandrite discovery alexandrite effect alexandrite gems alexandrite gemstone alexandrite history alexandrite jewellery alexandrite jewelry alexandrite lore alexandrite ring alexandrite stones alexandrite symbol alexandrite value antique alexandrite birthstone buy alexandrite cat's eye cats eye change of color chromium compound chrysoberyl chrysoberyl varietiy chrysoberyl variety chrysolite color change color change gemstone color change stone colour change created alexandrite cymophane czochralski alexandrite depilite diaphanite dichroism faq gem mining gem variety gemstone gemstone globes gemstone hardness gemstone healing gemstone healing properties gemstone meaning gemstone mine gemstone mineral gemstone variety gemstones genuine alexandrite hydrothermal process hydrothermal technique june gemstone kyocera alexandrite lab created alexandrite long pulse alexandrite long pulse alexandrite laser loose alexandrite mineral chrysoberyl mining australia mining exploration mining resources natural alexandrite pegmatite phenomenon precious stone prophetic stone pulse alexandrite pulse alexandrite laser q-switched alexandrite q-switched alexandrite laser real alexandrite russian alexandite russian alexandrite russian gemstone simulated gemstone solution growth synthetic alexandrite synthetic gem synthetic gemstone synthetic green synthetic stone tsarstone underground mining urals gemstone vapor deposition verneuil flame fusion widow stone

Close options details