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Heasley Mineralogy Museum

The Timothy N. Heasley Mineralogy Museum is nestled into the apex of the Snee Hall atrium and holds a diverse collection of minerals, fossils, lapidary works, and antique instrumentation. The displays within its glass walls feature specimens representative of the thousands of known minerals.
pyrite sample in the Heasley Minerological Museum
A pyrite specimen in the Timothy Heasley Mineralogical Museum.

Historic Significance and Type Localities

Many specimens in the Heasley Museum come from type localities and hold significant historical value. Among these are specimens from the Benjamin Silliman, Jr. “Cabinet of Minerals,” purchased by Ezra Cornell in 1868.

This collection formed the foundation of the university’s original Museum of Geology and Mineralogy, which was originally housed in McGraw Hall.

a mineral sample in the Timothy Heasley Mineralogical Museum
Specimen in the Timothy Heasley Mineralogical Museum.

Exhibit Organization and Thematic Displays

Originally organized according to the Dana System, the museum’s exhibits have evolved to engage a broader audience through thematic displays. These include:

  • Minerals of New York State and the Finger Lakes Region
  • The seven crystal systems
  • Unique characteristics of mineral species and groups (e.g., tourmaline, garnet, quartz)
  • Fluorescent minerals
  • Optical effects in natural crystals and lapidary materials
a golden mineral sample in the Timothy Heasley Mineralogical Museum
Specimen in the Timothy Heasley Mineralogical Museum.

Lapidary Art and Gemology

One of the museum’s most captivating exhibits showcases minerals alongside lapidary works, such as ornamental carvings and gemstones. Lapidaries skillfully harness the unique properties of minerals to create stunning effects in faceted and cabochon gemstones. These gems not only highlight the artistry of lapidary work but also provide a fascinating lens into optical mineralogy and geological processes.

At the heart of this exhibit is the Allen and William Bassett Gem Collection, a remarkable selection that exemplifies the intersection of science and artistry in gemology.

William Bassett leans on glass table, smiling, with glass shelves of minerals and gems in background
William Bassett, Cornell Engineering Professor Emeritus of Earth and Atmospheric Sciences, in the Timothy Heasley Mineralogical Museum.