Szaibelyite

Szaibélyite is basic magnesium borate mineral named after Stephen Szaibely (Sjájbely), a mine surveyor who found the first specimens at what is now the Băiţa Mining District (Baita Bihor), Romania in 1861. It is pale yellow to white and but appears colorless in transmitted light. It has a fibrous structure with a silky luster. It is found in metamorphosed limestones, dolomites, and salt deposits. Some of the best specimen come from Băiţa mining district, Nucet, Bihor, Romania, the Brosso Mine, Cálea, Léssolo, Metropolitan City of Turin, Piedmont, Italy, and Stinson Beach, Marin Co., California, USA. It is rarely found as a faceted gemstone.