Indochinites were ejected into the Earth's upper atmosphere by a huge meteorite impact 788.000 years ago in the Gulf of Tonkin (Vietnam). The steam jets cooled down in the higher atmosphere and condensed to form this type of glass. The pieces rained down hundreds and thousands of kilometers away from the impact, in direction South-East, reaching Philippines and even Australia. They have diverse shapes and a characteristic black color. This specimen is an Indochinite and specifically a Rizalite. Rizalites are found near Rizal, in Philippines and have characteristic round shapes and cleavages throughout. Certificate of authenticity included. IMCA 5591. Packages are usually sent the morning after the auction. Shipping is combined in all my listings - if you win multiple items, only one shipping cost is paid. Do not miss this opportunity!