2015: Princess Marie wears the brooch during the Dutch state visitThe focus in this brooch is on the ring of diamonds and sapphires that alternate around the edge, but perhaps the most impressive part is the large diamond cluster at the center. The jewel also has a removable diamond drop pendant. It can be worn as a brooch, or on a chain as a pendant necklace; Princess Marie has worn it with both a delicate chain and a more substantial necklace (seen in the last picture here).
2007: Queen Margrethe wears the brooch, sans pendant, at the beginning of a Swedish state visit to DenmarkIt dates back at least to Queen Alexandrine (1879-1952), wife of Christian X, and has passed down through the Danish royal family since then. Queen Margrethe was the last to use it before it was given or loaned to Princess Marie. Marie first wore it as a pendant to the New Year's gala banquet in 2010, so some have speculated that it was a present for the birth of Marie and Joachim's first child (much in the same way Queen Margrethe gave Crown Princess Mary an heirloom sapphire and diamond brooch after the birth of Prince Christian).
2015: Worn as a pendant during Queen Margrethe's birthday celebrationsMuch as Mary uses her heirloom, Marie exercises restraint in the use of her brooch. She wears it mainly for gala events and occasionally for special day events. I suppose there's something to be said for holding them for special occasions, but that sparkle...well, I'd find it hard to resist on a daily basis.
Photos: via Getty Images