I will try to value it according to current market rate. Anyone with knowledge is welcome to post here

He is referring to the star of Asia sapphire.

yes.its hard to say. the painting is not so clear.i will look for other sources and let u know

I was meaning more the bottom stone in her diamond necklace. It's not dangling like a regular pendant would but the pendant could be clasped to a dia...

Quote from Kevin Andrew Murphy: And here's another with the crown and with the same necklace again. Would the bottom pendant diamond be the right siz...

And here's another with the crown and with the same necklace again. Would the bottom pendant diamond be the right size to be the Carlotta diamond at ...

Here's one of the other paintings with the crown:

Yes, that's the crown. I found another painting of her wearing the same crown by a different painter, but no information on the crown itself.

There is a painting of princess Carolta wearing the crown? Is that the crown u referring to?

Welcome aboard Kevin. I will check up and get back to you. As I can see there r only few photos on that page.

hope all is well