The Halo Tiara worn by Queen Elizabeth in 1936, Princess
Margaret in 1954, Princess Anne in 1972, and The Duchess of Cambridge, now the Princess of Wales on her wedding day,
29 April 2011.
Infanta Maria Francisca of Portugal, Duchess of Coimbra, wore an historic emerald brooch in her hair for the dinner following her wedding to Duarte de Sousa Araújo Martins at her parent’s home in Sintra, Portugal on 7 October 2023.
The important emerald and diamond brooch belonged to her grandmother, Princess Maria Francisca of Orleans-Braganza, above in the picture. It was a wedding gift in October 1942 when she married in PETRÓPOLIS – BRASILIA, from her family.
The Emerald brooch was now, without the two pear shaped pendants.
Infanta Maria Francisca, the Duchess of Coimbra, also wore a pair of emerald and diamond earrings for the reception that belonged to her Princess Maria Francisca of Orleans.
The diamond from her engagement ring was taken from these earrings and the groom replaced it and one on the other earring with emeralds, see the details in the story before.
The historical tiara of Amelia of Orleans, last queen of Portugal,
Infanta Maria Francisca de Bragança, Duchess of Coimbra, has married lawyer Duarte de Sousa Araújo Martins in 2023 and wore Queen Amalie’s Diamond Tiara. The bridal gown, a spectacular princess dress, was made by Luzia do Nascimento.
As the second daughter of the pretender to the Portuguese throne, Infanta María Francisca was expected to shine with an ornate family tiara on her head.
The infanta has finally walked to the altar with a creation that dates back to 1887 and was made for Amelia de Orleans with 800 diamonds set in silver and gold, fringes,fleur-de-lis motifs and several rows of diamond necklaces. The previous year, Amelia had married the heir to the Portuguese throne, Prince Charles, Duke of Braganza, becoming the new Duchess of Braganza, so the Portuguese Royal Family ordered the house Leitão & Irmão, named Official Jewelers of the Portuguese crown for King Louis I, the making of a luxurious tiara. In fact, it was the King himself who chose his daughter-in-law’s design, which is why she baptized it “le diadème Dom Luis.”
Maria Francisca wore the same solitär diamond earrings that were worn by her mother on her wedding day. They were a gift from the Duchess of Braganza’s mother, Raquel Pinheiro de Castro Curvello.
Once formed over 150 kilometers deep within the Earth’s mantle, diamonds now glitter on many a ring finger. A recent study sheds light on how these precious gems made their way to the surface. Through geological clues and model simulations, researchers revealed how the breakup of tectonic plates led to volcanic eruptions that brought these „treasure-rich“ materials within our reach.
Diamonds are made of ordinary carbon, but what sets them apart from materials like coal is their purity and consistency. Naturally, their highly compact crystal structure can only form under immense pressure and heat in the Earth’s mantle, conditions found at depths over 150 kilometers. Over millions of years, diamonds were „baked“ in this extreme environment. The process of how they reached the Earth’s surface was roughly understood: diamond-bearing rocks melted due to geological processes, rose through fissures, and eventually surfaced during volcanic eruptions. The remains of these cooled volcanoes formed the deposits where raw diamonds are found today, typically embedded in a material known as kimberlite, named after the South African diamond-rich location, Kimberley. However, previous models couldn’t fully explain the origin of kimberlite melts deep within the Earth. It was evident that these processes were somehow linked to the restructuring of the Earth’s tectonic plates.
Unraveling the Mobilization Process
To investigate the geological processes leading to mobilization and kimberlite eruptions, the team led by Thomas Gernon from the University of Southampton delved into the matter. „The pattern of diamond eruptions is cyclic and follows the rhythm of supercontinents forming and breaking apart over hundreds of millions of years. However, until now, we didn’t know the process that suddenly brings diamonds to the Earth’s surface after resting 150 kilometers deep for millions or billions of years,“ says Gernon.
To gather new insights, the researchers analyzed the global correlation between the occurrence of kimberlites and the history of tectonic plate movements on Earth. They combined radiometric dating results with tectonic reconstructions, revealing that kimberlites formed over the past billion years typically erupted about 30 million years after the breakup of continental plates in the corresponding regions. This suggested an association with specific processes occurring at rift zones.
Hot Processes at Plate Boundaries
To shed light on the exact mechanisms, the team developed geological model simulations that provided a plausible picture of the processes. According to their explanation, a continental plate thins considerably over many millions of years before it breaks apart. This process, known as „rifting,“ causes the Earth’s surface to sink, eventually forming a rift valley. This is currently happening in East Africa, where the Rift Valley is forming. The model suggests that something similar occurs deep within the Earth: pieces of the underside of the plate sink into the mantle while hotter rock flows in from below to fill the void—similar to seawater on the surface. This incoming magma destabilizes the surrounding rock containing diamonds, turning the previously ductile material into a liquid that then rises upward. Eventually, through volcanic eruptions, it reaches the surface and solidifies into diamond-rich kimberlite.
Furthermore, the researchers can explain why volcanic eruptions with diamond-rich kimberlite can occur relatively far from the continental edges. These eruptions are also ultimately caused by plate breakup. Dynamic processes that extend far and wide occur during this process. „These flows along the underside of tectonic plates remove a considerable amount of rock, dozens of kilometers thick. This chain reaction ultimately reaches regions of the continents that are far from rift zones,“ explains co-author Sascha Brune from the German Research Centre for Geosciences (GFZ) in Potsdam.
Auguste Amalie war die älteste Tochter des Königs Maximilian I. Joseph von Bayern (1756–1825) und der Prinzessin Auguste Wilhelmine von Hessen-Darmstadt (1765–1796). Sie war im Januar 1806 mit dem Vizekönig von Italien Eugène de Beauharnais (1781–1824), dem zukünftigen Herzog von Leuchtenberg und Fürsten von Eichstätt, verheiratet. Eugène war der Sohn der Kaiserin Josephine (1763–1814), der ersten Ehefrau von Napoleon I. (1769–1821). Sieben Kinder wurden in diese Verbindung geboren, darunter
Prinzessin Josephine die spätere Königin von Schweden und Amelia, geboren am 31. Juli 1812 und würde Kaiser Don Petro heiraten. Peter I. von Brasilien (1798–1834) im August 1829.
Flower and Leaf Tiara Diamond Diadem Heirloom of the Haus Bayern and Wittelsbach. The bridal tiara is first seen worn from Princess Franz, Prinzessin Isabella Croy after her marriage in 1912.
But it was a brooch earlier and the wedding gift from Princess Ernst Arenberg to her mother, The Duchess of Croy.
Princess Ernst Arenberg was : Prinzessin Sophie Auersperg 1811-1901 oo Fürst Ernst von Arenberg 1777-1857
The diamond flower leaf tiara was later given to Princess Irmingard of Bavaria, her daughter. the tiara of the bride in the form of leafs branches and flowers was already worn by Prince Ludwig’s grandmother, Princess Irmingard of Bavaria, at her wedding in 1950.
Prinzessin Isabella von Bayern | Blüten & Blätter Diadem mit Saphiren Tiara| Royal Diadem Prinzessin Croy| Prinzessin Franz von Bayern| Haus Wittelsbach Bayern
Flower & Leaf Diamond Tiara| Royal Diadem of Princess Isabella of Bavaria| Princess Franz of Bavaria| House of Wittelsbach Bayern|Germany
The Russian Sapphire Cluster Brooch is now in the possession of the British royal family, it is similar to this brooch on the left. But different in size and cut!!!
Camilla’s brooch was the Russian Sapphire Cluster Brooch, previously worn by the late Queen Elizabeth II. The amazing brooch features a large central sapphire surrounded by 18 diamonds, separated from the central gem by an intricate gold filigree.
This was one of the numerous jewels that Queen Elizabeth II inherited from her grandmother, Queen Mary, in 1953. She bought it in 1934, and it was described a magnificent brooch with a sapphire stone as big as a wren’s egg, surmounted by large diamonds.
But for years it was „lent“ and in the jewel casket of the Queen Elizabeth The Queen Mother still in the year 2014, the first time which it was used by Queen Elizabeth II.