On Offer: An exceptional and extremely rare 0.623 gram Henbury "Pearl" impactite specimen measuring 12.28 mm by 8.33 mm by 7.62 mm. The Henbury pearls are similar to the Wabar pearls, but much more rare. This is the only Henbury pearl I have ever seen in person, though others must exist. As such, these pears are relatively unknown as they are so rare. This glossy black pearl is made of impact glass from the Henbury crater. I have never seen a Henbury pearl come on the market. However, the few impact pearls of any origin that hit the market usually get snapped up quickly.