Amethyst
The main factor to take into account when valuing an Amethyst is color: the more intense the hue, the higher the value, without appearing black or muddy. The most desirable Amethysts display hues ranging from medium to deep, transparent and deep purple color with random flashes of red or blue. A slight blue hue is desirable. Uruguay still has “Siberian quality,” gems but is showing signs of over mining.
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