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2. Star of India (gem) - Wikipedia

   en.wikipedia.org/wiki/Star_of_India_(gem)

   Star of India. The Star of India is a 563.35-carat (112.67 g) star sapphire, one of the largest such gems in the world. [1] [a] It is almost flawless and is unusual in that it has stars on both sides of the stone. The greyish-blue gem was mined in Sri Lanka [3] and is housed in the American Museum of Natural History in New York City.

3. Golconda diamonds - Wikipedia

   en.wikipedia.org/wiki/Golconda_diamonds

   The Golconda diamondiferous region is located in the Southern Indian peninsular shield, [2] which was formed during the process of proterozoic and Insular India. [3] The region is spread over 50,000 km 2 (19,000 sq mi), within the sediments of the Krishna-Pennar river basin and Deccan Traps, [2] and contains 120 out of the 150 kimberlite pipes in India. [4]

4. Allison and Roberto Mignone Halls of Gems and Minerals

   en.wikipedia.org/wiki/Allison_and_Roberto_Mignon...

   The Allison and Roberto Mignone Halls of Gems and Minerals are a series of exhibition halls at the American Museum of Natural History on the Upper West Side in Manhattan, New York City. The halls opened on June 12, 2021, as a complete redesign of their predecessors, the Harry Frank Guggenheim Hall of Gems and Minerals and Morgan Memorial Hall ...

5. List of diamonds - Wikipedia

   en.wikipedia.org/wiki/List_of_diamonds

   An Indian diamond which became famous during the days of the Mughal Empire. A diamond with a roughly pear-shaped outline and random faceting, including two Persian inscriptions, the first reading "Shah Akbar, the Grand King, 1028 A.H." (the letters mean Anno Hegirae). The second inscription read "To the Lord of Two Worlds, 1039 A.H. Shah Jehan".

6. Hope Diamond - Wikipedia

   en.wikipedia.org/wiki/Hope_Diamond

   The Hope Diamond is a 45.52 carats (9.104 g; 0.3211 oz) diamond that has been famed for its great size since the 18th century. Extracted in the 17th century from the Kollur Mine in Guntur, India, [1] [2] the Hope Diamond is a blue diamond.

7. Koh-i-Noor - Wikipedia

   en.wikipedia.org/wiki/Koh-i-Noor

   The governments of India, Iran, Pakistan, and Afghanistan have all claimed ownership of the Koh-i-Noor, demanding its return ever since India gained independence from the British Empire in 1947. [16] The British government insists the gem was obtained legally under the terms of the Last Treaty of Lahore in 1849 and has rejected the claims.