Black Onaping glass is a unique impact glass found in the Onaping Formation within the Sudbury Impact Structure in Ontario, Canada. This extraordinary glass is formed from a combination of surge deposits, suevite, and reworked materials in an aqueous environment.

Unlike volcanic glasses, Onaping glass showcases a range of different chemical compositions and petrographical characteristics. These qualities hint at a fascinating process called shock vitrification, supported by country rock clasts with microscopic shock-induced changes found in this impact glass.

The Sudbury Structure and the Onaping Formation's heterolithic breccias and igneous complex have long been subject of debate. While a meteorite impact origin is widely accepted, the recrystallized Onaping Formation glasses' origins continue to be discussed and studied.

Size of Specimen: 53mm L X 48mm W X 21mm D, Weight: 129.9 grams. The front is beautifully polished! This specimen contains prominent shocked garnet clasts embedded in a swirled glass matrix with stretched metal flakes.

Ships with a Certificate of Authenticity, tag, tag stand and information about Onaping impact glass. Photo cube and plexiglass riser are not included.

This is a rare opportunity to get this very attractive impact glass from the Sudbury Impact Structure for your collection. Not many have a polished front!

Ships with a Certificate of Authenticity, tag, tag stand and information about Onaping impact glass.