Maker's Mark Brooch & Identification

Good day,

I am new to this forum. I am from South Africa and have just recently found an old brooch in my late mother's collection. I have Googled the pictures of the brooch and it comes up as Edwardian, but I'm not sure? Also, the Maker's Mark is engraved by hand on the brooch. I have taken a close up picture to see if someone may be able to help with an identification.

The marking looks like K25 203?

Many thanks and warm regards,
Juliette

 

I think it’s more likely it’s a stock inventory mark. These were put on by jewellers or pawnbrokers etc.
It’s a beautiful brooch, a lot of jewellery wasn’t hallmarked then.

 

Ah right! That is very interesting. So it could be Edwardian then! Would the metal possibly be sterling silver? I should perhaps go get it tested then. I appreciate your input very much.

 

Could tthat K25 be 925? (Guess not. Not seeing a 9 there.)

 

Can you get a side photo of the stone or do you know what it is.

 

The back is late nineteenth certainly. Looks like an opal doublet but I think it has a crack sadly. Have you cleaned it? Old silver would be tarnished so it’s feasible that it’s white gold.