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Higher iron concentrations act as a quenching agent, which can slightly reduce fluorescence compared to Burmese rubies, yet provides a deep, saturated "architectural" red that remains stable under various lighting conditions.
Fine, short "silk" (rutile needles) are common, though often less dense than those found in Mogok specimens.
The primary allure of the Mozambican ruby lies in its exceptional transparency and versatile color range.
): Present in significant amounts, influencing the depth of color and suppressing UV fluorescence. Gallium ( ), Magnesium ( ), and Vanadium (