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Phenakyte nails in hydrothermal emerald

Phenakyte nails in hydrothermal emerald

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Phenakyte nails in hydrothermal emerald

This is a diagnostic inclusion for synthetics hydrothermal emeralds. As in this case, it often grows from the seed or at a step.
An inclusion easier to see in synthetic plants production focalized on growing speed improvement.
40X magnification , +camera zoom, Focal point : F/5, expo 1/4 s, ISO-192

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