Tavernier's book, the "Six Voyages" (French: "Les Six Voyages de J. B. Tavernier"), contains sketches of several large diamonds that he sold to Louis XIV in possibly 1668 or 1669; while the blue diamond is shown among these, Tavernier mentions the mines at "Gani" Kollur as a source of colored diamonds, but made no direct mention of the stone. Historian Richard Kurin builds a highly speculative case for 1653 as the year of acquisition, but the most that can be said with certainty is that Tavernier obtained the blue diamond during one of his five voyages to India between the years 1640 and 1667. One report suggests he took 25 diamonds to Paris, including the large rock which became the Hope, and sold all of them to King Louis XIV. Another report suggested that in 1669, Tavernier sold this large blue diamond along with approximately one thousand other diamonds to King Louis XIV of France for 220,000 livres, the equivalent of 147 kilograms of pure gold.