Waldemar Theodore Schaller (August 3, 1882 – September 28, 1967) was an American mineralogist and longtime employee of the United States Geological Survey (USGS).
On March 1, 1912, Waldemar Schaller resigned from his job at the USGS for a while so that he and his wife, Mary Ellen Boyland, could visit a number of museums in Europe and talk to the mineralogists in charge there.
In June of the same year he received his doctorate in philosophy in Munich under Professor Paul Heinrich von Groth for his study of the tourmaline group.
Likewise, his studies on the paragenesis of salt minerals and their deposits in New Mexico and Texas from the Permian period were groundbreaking for the British mineralogists and their later investigations of the English evaporites of the same age.
With kernite,[8] a rare but important ore for the production of boron was added in 1927, In 1950, the silicate miserite[9] followed in a corrective description and in 1958, together with Angelina C. Vlisidis, described the ajoite.