Israel 925 brooch pendant

Jumble sale find, 2 inches long and 1 and a quarter wide. At first I thought it was stone but now I think maybe it’s glass. Is that unusual? I don’t find a lot from there here in U.K. Thanks for any info.

 

Some kind of quartz?

 

Feels a bit warmer than stone, it’s cold at first but warms up quickly in my hand. I thought it might be a special glass ie Ancient Roman or something as it’s not very pretty glass, seems to have rough inclusions in it. Theres some rainbow petrol like colours in it which makes it a bit more attractive I think.

 

I think you are right that it's a shard of ancient glass. Made by whom I can't say, but perhaps found in that region. I don't understand the chemistry of it, but glass that spends an extended time in the ground will often develop that oil slick sheen.

 

https://www.judaicawebstore.com/roman-glass-and-silver-fountain-hamsa-pendant-p12541

 

How interesting. Think you're right too.

Debora