Hiddenite is a rare variety of the mineral spodumene. It is transparent gemstone of a green hue rather like a yellowish-green emerald. It is named after William Earl Hidden (1853-1918)and is found at Stoney Point, Alexander County, North Carolina, U.S.A.
see 1)Palache,Davidson & Garanson Amer Min 15 280 (1930)"The Hiddenite deposit in Alexander County, N.Carolina" 2)J.L.Smith Amer Jour Sci 21 ser 3 128-30 (1881)"Hiddenite, an emerald-green variety of spodumene"

William Earl Hidden was a distinguished mineralogist. He was born at Providence R.I., Feb 16, 1853 the son of James Edward and Abbie S. Hidden. He commenced his career as a mineralogist in 1872. In 1879 he undertook a search for platinum mines in the Appalachian belt of N.Carolina, S.Carolina, Georgia and Alabama. In 1880 he discovered a mine in Alexander County which produced emeralds and the new variety of spodumene which became known as hiddenite. He also discovered monazite in commercial quantities in N.Carolina, and this was used to provide thoria for incandescent gas lights.
He was co-discoverer (with Dr. James B. Mackintosh)of the minerals hanksite, sulphohalite,yttrialite, thorogummite, nivenite; (with Samuel L. Penfield) of of hamlinite; (with Dr. W.F. Hillebrand) rolandite and mackintoshite; (with Dr.J.H.Pratt)the gemstone rhodolite. He also discovered the mineral yttrocrasite, a yttrium-thorium-uranium titanate.
In 1911 he traced auerlite, a rich ore of thorium to its source in the Green River zircon belt of Henderson County, N.Carolina. He also mined there several tons of zircons which were used in electric light glowers and in making "zircon-glas".

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