I inherited a ring. How can I tell what the stone is?

[PlaymobilPirate]

It was my grandmother's - she'll have got engaged 1940s I think but I've no idea whether it's as old as that or whether she replaced her original.

I think it's cubic or glass but it glowed blue under uv lights today when I got my nails done and heard that might mean it's real?

It's hugely sentimental so I'm only bothered in case I need to insure it. Would glass still be very shiny after all these years?

If it is 40's it is likely 18ct with the diamond in a platinum setting, white gold wasn't as commonly used back then

I may well sew it to the skin of my finger if it is... or if it isn't. I'm not even a fan of yellow gold but it's made me so happy since it was found

I'd definitely get it checked,as Kiss says, that is a quality setting.

Kiss I'm useless. I assumed the setting bit was silver!

Take a photo of the hallmark and expand it on your phone.
I do it all the time with instructions that are too small for me to read!

Take it to a reputable independent jewellers, they will be able to give you a good idea. Although to be sure, they would have to take it out of its setting and weigh it. It looks real to me btw. The setting is very similar to my late dm's engagement ring, which dates from the same era.

Some diamonds glow in ultraviolet, some don't. My engagement ring has three diamonds and one of them glows, but not the other two!

Ring is really pretty! I would go to your local jeweller like everyone else is saying.

If you breathe into it, does the stone fog? It read that diamonds shouldn't fog, though I'm not sure how accurate that is.

It could also be a white sapphire.

Lovely ring OP. If it is a gold band then it probably is a 'real' (diamond) stone as usually only precious stones are mounted in gold or platinum settings. You can also visit a local auction house, most will have a jewellery valuer who would give a free valuation, but would charge if you needed a written value for insurance purposes.

Its really nice and delicate and it looks nice on your hands as well.
A year or so ago I was reading about a woman who had a costume ring with a massive diamond I think it was on it. She had picked it up for a couple of pounds at a car boot sale years ago and wore it all the time.
She thought it was glass and got it valued anyway it wasn't it was a very rare big diamond and it went for about a million or something like that at auction. I thought it was sad in a way because she enjoyed wearing the ring and that simple pleasure has now gone.

Well if it is a diamond it's a big un! And it is really nice too.

But no matter it is still precious to you no matter what. Go to an independent jeweller and ask.

Don't go to a chain. Independent jeweller will give you a rough idea. If you want an accurate figure you probably need to pay for a proper valuation

I still can't read them!

CZs only reflect white light; diamonds sparkle all colours. Hold it in the light and turn it backwards and forwards and see what sort of light is reflected by it.

It's a very pretty ring no matter what the stone is.

Oh that is sad Rudgie

Ooh pretty! Don't go to a chain jeweller, find a local indie jeweller's shop. They'll be happy to take a look.

Can you invert the colours on your last photo? That might give more definition to the marks?

The hall mark says 750 - that's 18 carat gold.

I can't make out the other symbols.

Hallmark looks like 750 which is 18ct

It looks very similar to the ring I inherited from my aunt
Worth £1200

Gosh I have the eyesight of an 80 year old!

Diamond.
I'm calling it.

AFAIK CZ wasn't used commercially in jewellery until the late 60 or early 70s. So if it's a 1940s ring, the stone is more likely to be a diamond or a flint glass fake (sometimes known as a 'paste diamond'.)

It's a gorgeous ring whatever the stone is.