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  2. What are Allochromatic and Idiochromatic Gems? - Gem Society

    www.gemsociety.org/article/gemstone-coloring

    Learn the difference between allochromatic and idiochromatic gems and why some gem species can occur in many color varieties and others occur only in one.

  3. Idiochromatic Definition & Meaning - Merriam-Webster

    www.merriam-webster.com/dictionary/idiochromatic

    The meaning of IDIOCHROMATIC is colored inherently and characteristically : having a distinctive and constant coloration —used especially of minerals. How to use idiochromatic in a sentence.

  4. 7.12: Causes of Color - Geosciences LibreTexts

    geo.libretexts.org/Bookshelves/Geology/Gemology...

    Idiochromatic colors caused by transition metal constituents. The crystal field theory described above also applies to minerals that have a transition metal ion in its ideal chemical composition.

  5. IDIOCHROMATIC Definition & Meaning - Dictionary.com

    www.dictionary.com/browse/idiochromatic

    Idiochromatic definition: (of a mineral) deriving a characteristic color from its capacity to absorb certain light rays.. See examples of IDIOCHROMATIC used in a sentence.

  6. The origins of color in minerals - Mineralogical Society of ...

    www.minsocam.org/msa/collectors_corner/arc/color.htm

    Idiochromatic colors caused by major transition-metal constituents. Several examples of this type of color are given in Table 2 and many more can be deduced with some certainty from merely knowing the chemical composition of minerals containing essential transition-element ingredients.

  7. What are Idiochromatic Gemstones and which is the best semi ...

    www.gemstoneuniverse.com/blog/natural-fine...

    Idiochromatic Gemstones are those gemstones that areâself colored†meaning the color comes from the fundamental chemical composition of the gem itself and not because of any other impurities in the crystal.

  8. Physical and Optical Properties of Gemstones - International ...

    www.gemsociety.org/gemology/physical-and-optical...

    What are Allochromatic and Idiochromatic Gems? Learn the difference between allochromatic and idiochromatic gems and why some gem species can occur in many color varieties and... Read More