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

Unlike other volcanic glass, 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: 59mm L X 52mm W X 10mm D, Weight: 61.4 grams. This specimen contains prominent shocked garnet clasts embedded in a swirled glass matrix with stretched metal flakes. The macro images are consistent with material found in black onaping glass. No cracks or repairs. The apparent lines at 50X magnification are metal-filled.

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.

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