Hoegbomite occurrences in New York, Virginia, and North Carolina were investigated. The North Carolina locality is a new hoegbomite discovery.
Hoegbomite occurs in emery or hornfels associated with emery. It formed at the expense of an earlier spinel. In North Carolina two varieties of hoegbomite were discovered, hoegbomite A and hoegbomite B. Hoegbomite A appears to be transitional between spinel and hoegbomite B. The hoegbomite of the New York emery deposits was formed later than the emery but earlier than the high-temperature quartz veins which represent the last stages of the intrusion that gave rise to the emery.
Some of the properties of hoegbomite are discussed.