glauberite

[glou-buh-rahyt]

noun

a mineral, sodium calcium sulfate, Na2Ca(SO4)2, often found as a deposit on the beds of salt lakes.

Origin of glauberite

1800–10; < French; so called because chemically similar to Glauber's salt; see -ite¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Among the saline minerals in the cabinet are Glauberite, and Sassoline or native Boracic acid.
A Guide to the Mount's Bay and the Land's End
John Ayrton Paris