Only Crux from the Article:

• The Supreme Court  refused to further dwell on a petition seeking a judicial declaration to bring the Kohinoor diamond back from the United Kingdom, leaving the task to the wisdom and efforts of the government.
• The affidavit said the Antiquities and Art Treasures Act of 1972, which prevents the export of precious articles and treasures from the country, was toothless as the British East India Company confiscated the Kohinoor from the boy king Maharaja Duleep Singh in 1849 — “it is a known historical fact.”
• Though both India and the U.K. were signatories to the UNESCO Convention on Means of Prohibiting and Preventing Illicit Import, Export and Transfer of Ownership of Cultural Property, the restitution of Kohinoor would require a “special agreement” between both countries.

Source: The Hindu