Moonglow? glass UV glow brooch help ID

Hi guys,
I have had this brooch for a while and it looks somehow strange to me. IMO it is glass, most probably Czech. It's center glass stone (about 3 cm in diameter) glows and changes color from baby blue to grayish to brownish, and is surrounded by sapphire blue rhinestones. But it does not look to me as usual moonglow glass. It also glows intensive yellow-green under UV light. It is broken and lacks clasp.
Can you please help me with ID what glass it is. Thank you for your attention and time!

 

That’s pretty!
Is it definitely the glass that is glowing not the glue underneath? It’s not easy to see from the photo.I’ve been caught out by that before as glue is very reactive.
Can we see the back anyway?

 

Thank you, KSW! The photo is not good, I tried several times to take picture of the glow and each time my camera seems to catch something absolutely different from what my eyes see. It looks like the glass is glowing like real ruby but intensive yellow-greenish - this is for comparison only. Actually it glows like uranium glass, similar colour and intensity:


I will try to think of some way to do it better to catch the real glow. I will do it later, and also the back, not at home now.

How can I know if the "stone" glows or the glue? The "stone" is not transparent as far as I can see, and the UV light should not be able to reach the glue.

 

Good Lord-The Czechs & Italians really know how to create lovely glass.Glass must be a major industry in Czechoslovakia.

 

It’s an addiction, I’m like a child in a sweet shop. ‘Ooh, look at those pretty beads….and those….and those…. ‘

 

The truly deep 'Joolies' are addicted,that's why you all have such amazing expertise.I occasionally run into 80+ old Joolies elbowing thru thrift stores,tough as nails 'never say die' hunters & still sharp as a tack.
If I stumble across a cuneiform tablet i email Dr Irving Finkel at the Brit Museum.If I discover some 'Bling',I just post it here.

 

Wonder if it could be sapihiret? That's sort of the right palette.

My camera & my eyes disagree in the same way when trying to photograph color change sapphire. I can see blazing peacock blue; my camera, when set on auto, stubbornly sees purple. Think you have to really know what you're doing with a camera to get over this.

 

The description of the color change (minus the "grayish") does sound like what one associates with saphiret, but the photo (unless really misleading the color) doesn't look like saphiret to my eye. You don't really get a gray color in the transition, plus the vertical lines on this one make me think more satin glass/moon stone as the center stone.

IvaPan, definitely post a few more photos though, and include the back.

 

KSW, same with me! I will never be able to wear all the pieces I have accumulated, and mind that I haven't done it for long time, started just a year or so ago. Madness!

It certainly used to be during the Cold War. When Soviets were given half of Europe by the victorious allies, old Bohemia and later Czechoslovakia was among their trophies. And this is a region famous with glass production for centuries. It became communist, part of Comecon and its glass jewelry industry worked at full speed and supplied the whole USSR dominated block. Under the prohibition for real stone and precious metal trade under communists, Czech glass jewelry was almost the only option for the population of the Eastern block, and was extremely popular. Now shreds of it still exist, the old Jablonex, a state own giant of glass jewelry, bankrupted around 2000 and was substituted by several small companies still producing Czech glass but there are many other competitors, especially China and India.

Thank you, Bronwen! I also pondered about sapphiret but it looks somehow different, IMO. The palette is similar but the looks differ. This one has kind of stripes of different colours that flow into each other when the brooch is moved while in sapphiret the colours are diffused (or spilled??) all over the surface. Don't know if I express it well. Also IMO it is not old enough to be it.

Absolutely! Tried again and will post the result in a while.

 

Might be sapphirine rather than sapphiret.

 

I’m wondering if it’s cats eye glass?
Something like this but older?

 

Thank you guys for your efforts to ID! I do appreciate it!
KSW, yes, cats eye seems a plausible option. Does it come in stripes of different colours? The cats eye glass I have seen is with nuances of the same colour only.

 

Thanks, OBB, it also is an option. I haven't seen much of it though and cannot judge.

 

Wondering if this is either a button or the top of a hat pin??

 

Thanks, Lucille, actually I somehow assumed it was a brooch but you are right, it has just one point of attachment to something. If it were a brooch, it should have had least two, shouldn't it? It is quite large though about 4 cm in diameter, and with those glass stones quite heavy.