Quartz

specimen number:
2062458

location:
Aribabi, Huachinera, Sonora, Mexico

description:
A glassy gemmy light purple reverse scepter crystal of quartz, this the variety known as amethyst, measuring 1.2 cm in height coming off matrix. In good condition. From the 1990s.

Aribabi is a historic historic locality and ranch area within the municipality of Huachinera in northeastern Sonora, Mexico, with roots stretching back to the Spanish colonial era as an early mission and settlement site, though specific formal opening and closing dates for its historical mining activities are not officially documented. Geologically, the region is situated within the rugged volcanic terrain of the Sierra Madre Occidental province, characterized by extensive Tertiary volcanic sequences, rhyolitic flows, and hydrothermal fault systems that facilitated the circulation of mineralizing fluids. Within these local volcanic cavities and hydrothermal pockets, quartz solutions crystallized to form prized specimens of amethyst, notably featuring unique scepter and reverse scepter growth habits where later-stage crystal development abruptly changed proportions over earlier quartz stems.

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