My mum does sometimes have an unrealistic view of how much things cost so I thought I'd put this out there.
She says that a good rule of thumb when looking for a diamond solitaire ring is that 1 carat = £1000. I can't find any solitaires for this much, even looking on antique/vintage sites.
Is this realistic, and if not, what is a good rule of thumb for a 1 carat solitaire ring?