A few white acicular single crystals of the extremely rare Ca-borate mineral tertschite from the type and only known locality worldwide in Turkey (Kurtpınarı Mine, Faraşköy, Bigadiç, Balikesir Province, Turkey). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY 4.0
Tertschite
Tertschite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Ca₄B₁₀O₁₉·20H₂O.
Key properties: Silky luster.
IMA symbol Trt, IMA status: questionable, named in 1953.
Found in a borate deposit.
It is found associated with Colemanite, meyerhofferite, ulexite.
The mineral was named to honor Professor Hermann Tertsch (1880–1962), Austrian mineralogist, University of Vienna, Vienna, Austria.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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