Willhendersonite is a rare mineral belonging to the carbonate family, specifically a member of the ankerite group. It was first discovered in the Big Creek area of Fresno County, California, and is named after William F. Henderson, a noted American mineral collector.
Willhendersonite typically occurs in association with other minerals such as calcite, dolomite, and quartz. It forms as small, prismatic crystals or aggregates, often exhibiting a white to pale pink color. It also possesses a vitreous to pearly luster, appearing translucent to transparent. The mineral is known for its brittle nature and lower-than-average hardness, rating 3 to 3.5 on the Mohs scale.
Chemically, willhendersonite is composed of calcium, magnesium, carbon, and oxygen in the form of a calcium-magnesium carbonate. Its chemical formula can be represented as (Ca,Mg)(CO3)2. This composition places willhendersonite within the carbonate class of minerals, which are commonly found in sedimentary environments.
Since willhendersonite is relatively rare, it holds moderate value among mineral collectors and geologists. Its occurrence in limited localities and the unique crystal habits it exhibits make it an intriguing mineral for study. However, due to its limited availability and lack of industrial significance, willhendersonite is primarily of interest to collectors and researchers in the field of mineralogy.
