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Hajar | all galleries >> Mineral Galleries >> Crystal Twins >> Twins of Trigonal Minerals >> Quartz >> Quartz Crystal Twins > Ametrine, 8 cm polished crystal section showing purple and yellow sectors. Anahi Mine, Sandoval Province, Bolivia.
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09-AUG-2013

Ametrine, 8 cm polished crystal section showing purple and yellow sectors. Anahi Mine, Sandoval Province, Bolivia.

Polysynthetic Brazil Law twinning can be seen in the purple sectors.

A very good explanation of sectoral zoning can be found here: http://www.cas.miamioh.edu/~rakovajf/WTTW%20Sectoral%20Zoning%20Galley.pdf


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