Allison and Roberto Mignone Halls of Gems and Minerals
Walk two galleries holding more than 5,000 specimens from 98 countries, arranged around how minerals form, including a 380 kg stibnite, a 1,400 kg labradorite block, a 1.5 metre beryl crystal and a garnet-studded slab weighing 6,577 kg.
The visit
Why it is worth the trip
The halls are organised by formation environment rather than by beauty, which is the clearest public explanation of why particular gems come from particular geological settings.
Before you go
The museum states the halls are included with any admission. A slab from the Sterling Hill mine in New Jersey is displayed here to show fluorescence under long-wave and short-wave ultraviolet light.
Compiled from amnh.org, read on August 16, 2026.
Opening times, seasons and prices change, and we are not the operator. Confirm directly with the venue before travelling. We take no commission on any visit.