

[photo and information courtesy of Lafayette]
"The tiara Queen Louise is wearing belongs to her personal collection. It could be mounted without the large pear shaped pearls. It looks as if it is not a real tiara and I am not sure about that. She had the tiara when she was young so I should think that it comes from her mother Landgravine Louise Charlotte of Hesse, born Princess of Denmark. When her mother died her jewelry was parted into as many parts as she had daughters and she stated in her will that her son, Landgrave Friedrich, should not have any of her personal jewelry. I guess that he inherited jewelry belonging to the house.
The earrings seem to be pearl drops. They also are part of her private collection.
Around her neck the Queen is wearing a dogcollar or more precisely a velvet ribbon with diamond jewelry on it. It has been mentioned that the jewels should be some flower bouquets from the Danish crown jewels but is not. It is diamond pieces from her personal collection. The necklace is a brillant necklace belonging to the Danish crown jewels that can be seen at the Rosenborg Palace in Copenhagen. It was made by the jewellers Weishaupt und Söhne in Hanau, Germany, in 1840. The stones already belonged to the Danish royal family for years and they had been part of the other pieces of jewelry in the family. So was the square cut diamond in the middle of the necklace (17 carats) once set in a ring that was given as a wedding ring from King Christian VII to his unfortunate queen Caroline Mathilde, born a Princess of Great Britain. The pear shaped diamonds (the biggest in the middle is 19 carats) had all been used in aigrettes for earlier queens. Most of the stones were given by Queen Sophie Magdalene to the crown and they are the basis in the Crown jewel collection.
The necklace has a matching set of earrings but they are not used as so by the Queen in this photo. You can see them though as brooches on the dress along the sash of the Russian St. Katharina's Order. There are 2 more brooches at the line of the sash and those two must also belong to her
personally.
Above the sash at the decolleté there is a brooch that also belongs to the Danish crown jewelry: a brooch made of rubies, diamonds and pearls. The pearls are not seen here, and the brooch is only the lower part of the devant-de-corsage of the crown jewels."