Featured Glass or stone?

I found this cute little brooch today at the charity shop. It tests as silver but I'm trying to figure out the stone. I thought I saw air bubbles so I'm pretty sure it's glass, but it went up by one bar on the gem tester. I thought glass would not react?

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Lovely, Rachel. It looks like a Scottish Cairngorm brooch.

Glass is 5-6 on the Mohs scale, so a hardness tester will react to it.
A Cairngorm can be citrine or smokey quartz, but sometimes glass was used.

 

I concur...

 

That’s a very nice mid to late nineteenth silver brooch. In the Scottish style as made fashionable by Queen Victoria. I agree it might well be Cairngorm.

 

Oh!! I did think it was scottish, but it sounds a bit more special than that yippee!

I thought this would date to 1900-1910 because of the length of the pin, also there's barely any room between the pin and the brooch for any sort of thick material, but I guess if its not worn on 'normal' attire it would be different?

I'll try to get a photo of the air bubbles I thought I saw. Hopefully they're not!

 

Cairngorm brooches aren't just worn to fasten a plaid, but also as 'regular' jewellery. They were very fashionable in the 19th century, just like Scottish pebble jewellery, but traditional style Cairngorm jewellery is still made.
This is an oldie though.

 

I find it strong and delicate at the same time......... lovely piece !

 

Photos of the air bubbles! I'm pretty convinced its glass.

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Yes, definitely glass. And great photos.