They produce zinc and lead concentrates as well as boric acid colemanite.
2.
The use of ores like colemanite has declined following concerns over arsenic content.
3.
Colemanite is a secondary mineral that forms by alteration of borax and ulexite.
4.
A hydrated form occurs naturally as the minerals colemanite, nobleite and priceite.
5.
In 1925 the Suckow Chemical Company produced a few hundred tons of colemanite from this shaft.
6.
Colemanite borax ore from the mines at Borate was carried in wooden, side-dump ore cars.
7.
A map of the Death Valley Railroad running from Death Valley Junction all the way up to the mines at Ryan near Colemanite
8.
It is also found as a constituent of many naturally occurring minerals borax, boracite, ulexite ( boronatrocalcite ) and colemanite.
9.
That same year Suckow sank another shaft just a little south of his last one and found a thick bed of colemanite at.
10.
Ulexite is frequently found associated with colemanite, borax, meyerhofferite, hydroboracite, probertite, glauberite, trona, mirabilite, calcite, gypsum and halite.
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