They can have lots of inclusions, both visible and microscopic. So this is what can give them a cloudy appearance. Furthermore, because they do not show as much brilliance this gives them more of a muted and cloudy appearance.
Why do white sapphires get cloudy?
They can have lots of inclusions, both visible and microscopic. So this is what can give them a cloudy appearance. Furthermore, because they do not show as much brilliance this gives them more of a muted and cloudy appearance.