Английская Википедия:Island of the Jewel
The Island of the Jewel (Шаблон:Lang-ar Jazīrat al-Jawhar)Шаблон:Refn or Island of Sapphires (Шаблон:Lang-ar Jazīrat al-Yāqūt) was a semi-legendary island in medieval Arabic cartography, said to lie in the Sea of Darkness (Bahr az-Zulamat) near the equator, forming the eastern limit of the inhabited world.
The island does not appear in any surviving manuscript of Ptolemy's Geography nor other Greek geographers. Instead, it is first attested in the Ptolemaic-influenced Book of the Description of the EarthШаблон:SfnpШаблон:Sfnp compiled by al-Khwārizmī around 833. Ptolemy's map ended at 180° E. of the Fortunate Isles without being able to explain what might lay on the imagined eastern shore of the Indian Ocean or beyond the lands of Sinae and Serica in Asia. Roman missions subsequently reached the Han court via Longbian (Hanoi) and Chinese Muslims traditionally credit the founding of their community to the Companion Saʿd ibn Abi Waqqas as early as the 7th century. Muslim merchants such as Soleiman established sizable expatriate communities; a large-scale massacre of Arabs and Persians is recorded at Yangzhou in 760.[1][2] These connections showed al-Khwārizmī and other Islamic geographers that the Indian Ocean was not closed as Hipparchus and Ptolemy had held but opened either narrowly or broadly.
The four chorographic maps of the AD 1037 manuscript of al-Khwārizmī—including that of the Island of the Jewel—are the oldest surviving maps from the Islamic world.Шаблон:Sfnp Al-Khwārizmī gave the Island of the Jewel as the easternmost point of the inhabited world.Шаблон:Sfnp His gazetteer is divided by categories but altogether he provides coordinates for its coast, three cities, its surrounding chain of mountains, and two summits on the interior.Шаблон:Sfnp It lies in the Sea of Darkness near the equator,Шаблон:Sfnp east of his equivalent of Ptolemy's Golden Peninsula (Malaysia) and east of the still larger phantom peninsula—now usually known as the Dragon's TailШаблон:Sfnp—which replaced Ptolemy's unknown eastern shore of the Indian Ocean.Шаблон:SfnpШаблон:Sfnp Its center was given at 173° east of al-Khwārizmī's prime meridian off west Africa and 2° north of the equator.Шаблон:Sfnp
It subsequently appeared in the world map of the Book of Curiosities—where it is labelled "The Island of the Jewel, and its mountains encircle it like a basket"Шаблон:SfnpШаблон:Sfnp or "like scales"Шаблон:SfnpШаблон:Sfnp—and in other medieval Arabian and Persian texts.
It is now typically identified with one of the Indonesian islandsШаблон:SfnpШаблон:Sfnp or with Taiwan,Шаблон:SfnpШаблон:Sfnp although al-Khwārizmī's description seems to borrow from Ptolemaic and legendary accounts of Taprobane (Sri Lanka).Шаблон:Sfnp
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