Topic: Conchoidal fracture (bruise) on Greta Vase

[paradisetrader]

conchoidal fracture

Thank you Adam
Yes that seems to be it alright

A conchoidal fracture has curved lines, rather like a sea-shell (which is where the word "conchoidal" comes from). Obsidian has conchoidal fractures, as does ordinary glass.
http://www.gwydir.demon.co.uk/jo/minerals/obsidian.htm

I'm glad it translates easily into German for you Pamela  

[pamela]

aa:  
Peter:  
obsidian is glass