Author Topic: Conchoidal fracture (bruise) on Greta Vase (Read 2661 times)

paradisetrader · « **Reply #10 on:** November 08, 2005, 09:41:15 AM »

Cathy thats not a favour at all
Height is 20cm, width is 30cm
Reeds in frosted section =5

paradisetrader · « **Reply #11 on:** November 16, 2005, 03:30:38 PM »

New pic with the aid of a magnifying glass
Not very good but the best I can do ...
It measures about 1cm across
(http://glassgallery.yobunny.org.uk/albums/userpics/10006/PB131222.JPG)
and Im now thinking its a "bruise" but still not sure.......

Connie · « **Reply #12 on:** November 17, 2005, 02:48:30 AM »

FWIW - It looks like a bruise to me.

Frank · « **Reply #13 on:** November 17, 2005, 06:05:12 AM »

Seconded

Ivo · « **Reply #14 on:** November 17, 2005, 08:06:41 AM »

"Three independent forensic experts have confirmed"....

paradisetrader · « **Reply #15 on:** November 17, 2005, 10:59:16 AM »

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 · « **Reply #16 on:** November 17, 2005, 07:19:55 PM »

Not really, the ripples are a shock wave.

KevinH · « **Reply #17 on:** November 17, 2005, 08:44:09 PM »

... and "sub-surface bruises" are often seen in the sides of paperweights.

aa · « **Reply #18 on:** November 18, 2005, 06:27:35 PM »

I believe the correct term is conchoidal fracture

pamela · « **Reply #19 on:** November 18, 2005, 06:39:37 PM »

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'

Author Topic: Conchoidal fracture (bruise) on Greta Vase (Read 2661 times)

Connie