I call this one the "Maria Anna tiara", because GD Maria Anna (née Bragança) was the first one to be photographed wearing it, at her daughter Hilda's wedding. I have no information on if she was the first owner or the origin of the tiara. The tiara passed to the main line and became more known worn by GD Charlotte, who wore it for oficial photographs. That's why it's often referred as "GD Charlotte tiara".
--Previous Message-- : it's GD Adelaide Tiare with a big blue : sapphire, it can be removed an replaced by : an large aquamarine. : GD Charlotte wear this tiare with a diamond : riviere on a base. : : : : : : : : : : : : : : : : : : :