The Delaware Mineralogical Society is the name of a club in Delaware composed of people who share interest in minerals, gems, fossils, lapidary arts, and other related fields. They offer an attraction which is a natural history museum in nature in Wilmington, Delaware.

Formed in 1960, the Delaware Mineralogical Society offers a venue for enthusiasts of minerals, gems, fossils, and other such fields of study and interest to learn more and share their experiences. They are open to membership to all ages.

The Delaware Mineralogical Society is also best known for their Annual Gem, Mineral, & Fossil Show held every first full weekend of March at the DelTech Stanton Campus. They also host regular field trips to various mineral or fossil collecting sites in the country.