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RM1879   Hydroboracite and probertite

Mustafa Kemal Pascha Mine, Kestelek, Mustafa Kemalpafla, Bursa, Marmara, Turkey

Rich radial aggregates of hydroboracite crystals, colorless to white, with a very intense adamatin luster. SEM-EDS analysis show the absence of sodium, with magnesium and calcium predominant. Boron can not be observed with this spectroscopic technique. Turkey is one of the largest producers of borates in the world, with reserves that surpass those of other countries such as USA, China or Russia. The borate works are located a few miles SE of Kestelek. Spectacular fluorescence yellow for hydroboracite and orange for probertite.

Size: 8.7 x 6.5 x 4.5 cm.

Fluorescent under long wave UV