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Nevertheless, not all topazes grow from pegmatitic mineral formation, for fluorine-rich solutions also impregnated the country rock at an even later stage and, where hot enough, dissolved the existing minerals. Thus silica and alumina were freed so as to combine with the fluorine to form topaz. Such processes of replacement took place mainly in cracks [...]

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Ever since man became acquainted with topaz, this noble stone has been paying dearly for the melodiousness of its name, which was formerly bestowed on the whole range of all yellow to golden brown gemstones. At the heart of such misnomers is the citrine, a variety of quartz mostly obtained through the heating of amethyst. [...]

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ALL stages of imaginable color possibilities are captured by this gemstone which, in addition to white and black, embraces every hue to be found in the spectrum, not only in pure tones but in all the fine nuances of innumerable shades, transitions, and mixtures. Should a collector set himself the task of amassing all the [...]

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