Todorokite : (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12·3-4H2O
Colemanite : Ca[B3O4(OH)3]·H2O
As recorded:
Corkscrew Canyon Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo Co., California, USA
Current ownership:
The Douglas Merson collection.
Mineral(s)
Source:
2019 Northern California Mineralogical Association conference giveaway table
Acquisition date:
1st Jun 2019
Photo added to mindat.org
“Black todorokite on colemanite.
Photographed by and in the collection of Douglas Merson.
”
Douglas Merson - 6th August 2019
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