Trona Mine, Trona, Argus District, Argus Range, San Bernardino County, California
Small cabinet - 6.9 x 4.3 x 2.3 cm
63 grams
Specimen status: Available
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This specimen began as a sharply
formed, blocky borax crystal which was replaced by snow
white tincalconite. The replacement occurs by dehydration,
when borax - Na2B4O5(OH)4·8H2O
loses five molecules of water to become tincalconite - Na2B4O5(OH)4·3H2O.
From a less common locality for this borate replacement,
known mostly for hanksite. Excellent condition.
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