''Queen of Holland diamond'' - once owned by the well-known cricket player Maharajah Ranjit Singhji

From Kollur mines. Queen of Holland diamond. spendlikeaking.blogspot.com/

Queen Wilhelmina of Holland. en. wikipedia org.

 The famous Queen Holland diamond, the legacy of the royal family of Holland,  is one of the famous diamonds of the world.  Though it's origin is  a bone of contention among diamond experts, many of them  are of the opinion that considering its quality, purity and shine, it was a  typical Golconda diamond (From Kollur mines, Andhra). This final decision was taken  by many professional diamond cutters in the city of  Amsterdam in 1904. The superior quality, size and unique  blue tint corroborated their view. Earlier it was thought that its origin was from South Africa.  The famous  
 F. Freidman & Co. fashioned it into a cushion-cut  and named for Queen Wihelmina of Holland, a famous  much-loved queen  who reigned from 1890 to 1948

Maharajah Ranjit Singhji.  www.quora.com

Above image:  Sir Ranjitsinhji Vibhaji Jadeja, GCSI GBE (10 September 1872 - 2 April 1933[1]), commonly  known as Ranji, was the ruler of the Indian princely state of Nawanagar,  now in Gujarat  state.   From 1907 to 1933, as Maharajah Jam Saheb, a world famous Test cricketer who played for the English cricket team. He also played first-class cricket for Cambridge University, and county cricket for Sussex.  Ranji has widely been regarded as one of the greatest batsmen of all time  Neville Cardus described him as "the Midsummer night's dream of cricket". Unorthodox in technique and with fast reactions, he brought a new style to batting and revolutionized the game.  In spite of his rich legacy and wealth, he was a simple person and ruled his small Princely state well.  vide: https://en.wikipedia.org/wiki/Ranjitsinhji   ...........................
This famous blue-tinted diamond was  purchased  in 1930 by none other than  Maharajah of Nawanagar. Ranjit Singh was  a legend in the world of cricket,  and  he  played for the English  Cricket team.  At this time  Albert Monnickendam, who wrote  “The Magic of Diamonds''. mentioned that in terms of quality and shine this Queen of Holland  diamond is on par with that of  the famous Regent diamond (yet another diamond from Kollur mines).  Classified as one of the finest diamonds, it is considered the 10th largest ‘D’ color diamonds in the world. Once the French President Doumergue  of France 1924-1931 was on a visit  to see the Queen of Holland. Her diamond was shown first to him, however, his resentment  subsided when he saw the queen later. As he  took a look  at the stone  leisurely he was told the  value of the diamond was roughly 1 to 1.5 million dollars.

The Maharajah of Navnagar (now in Gujarat) Kumar Ranjitsinghji Vibhaji, upon its ownership, handed over the diamond  to  the well-known jeweler Cartier, with the responsibility of setting  it in a beautiful piece of jewellery. Cartier, as wished by the Indian ruler, set the diamond as the center piece of a pendant, in a fine-looking  necklace.  The ruler of Navanagar had the Queen of Holland diamond in his possession  for his life. After his  death in 1933, the diamond remained with his family until 1960 when Cartier purchased it from them. Cartier displayed it for sale in their London store where it was eventually purchased by  one William Goldberg. After a minor re-cut to its current weight - its original 136.25 carat weight  reduced to its current weight of 135.92 carats,   Goldberg, in turn, sold it to Robert Mouawad, his partner. Robert Mouawad, a Lebanese diamond investor and collector, bought it for $7 million, a big money in those days.
https://www.langantiques.com/university/queen-of-holland/
https://www.indianetzone.com/6/queen_holland.html