Kurnakovite

specimen number:
2063837

location:
U.S. Borax Mine, Boron, Kern Co., California, USA

description:
A sharp loose colorless gemmy crystal of kurnakovite. In great condition all around. Good example for the species.

The U.S. Borax open pit mine in Boron, Kern County, California, operates within the massive Kramer deposit, an ancient dried lake bed formed during the Miocene epoch that holds one of the world's richest reserves of borate minerals. Commercial mining began here in the early twentieth century, transforming the desert landscape and yielding vast deposits of sodium borates. Within these complex evaporite sequences, rare borate species like kurnakovite developed as glassy, triclinic crystals. Kurnakovite forms through the evaporation and chemical evolution of borate-rich brines in arid lacustrine environments, making specimens from the Boron pit highly prized by systematic mineral collectors for their distinct crystal forms and association with other rare borates.

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