Gibbsite with Gypsum on Matrix from Laochang Mine, Yunnan, China

Dimension: 3.5cm x 3.5cm x 1.2cm
Weight: 15 carat / 3g
Locality: Laochang ore field (Laochang Mine), Gejiu Sn-polymetallic ore field, Gejiu Co., Honghe, Yunnan, China
 
Gorgeous waves of blue Gibbsite with colorless to milky white Gypsum crystals on matrix.  From a recent 2020 small pocket discovery, this rare Gibbsite mineral is very aesthetic and eye-catching.  Comes with a high quality acrylic display box.
 
Gibbsite was first discovered in 1820 by Chester Dewey (1784-1867) of Williams College, Massachusetts. It was first thought to be Wavellite, but a year later it was determined to be a separate mineral species and was subsequently named Hydrargillite. It was then renamed Gibbsite in 1822 by John Torrey (1796-1873) in honor of George Gibbs (1776-1833) of New Haven, a noted mineralogist whose important collection was acquired by Yale University.