Glass Discussion & Research. NO IDENTIFICATION REQUESTS here please. > Germany
Conchoidal fracture (bruise) on Greta Vase
paradisetrader:
Thank yopu all
The striations can only be seen under magnification - otherwise it just looks frosty - which is what threw me off.
It seems odd that a knock can do this without cracking the surface. Just another of the many mysteries of glass !
Frank:
Not really, the ripples are a shock wave.
KevinH:
... and "sub-surface bruises" are often seen in the sides of paperweights.
aa:
I believe the correct term is conchoidal fracture :D
pamela:
aa: great post - I LOVE languages and this is reading it square:
conch - Muschel (the most expensive pearls by the way)
bruise - break: Bruch
conchoidal - muschelig
everyone understands German this way - mother of pearl breaks
'muschelig'
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