Editing Diamond cut (section)

=== Ancient India ===
[[File:British Museum The Islamic world Necklace Kundan India 21022019 7703.jpg|thumb|Indian gold necklace with [[pearl]]s, [[Ruby|rubies]], [[emerald]]s, and conservatively cut diamonds mounted in traditional [[Bezel (jewellery)|bezel]] settings.]]
The process of diamond cutting has been known in the [[Indian subcontinent]] as early as the sixth century AD. A sixth-century treatise [[Ratna Pariksha|Ratnapariksa]], or "Appreciation of Gems", states that the best form in which to have the diamond is in its perfect natural octahedral crystal form, and not as a cut stone, indicating that diamond cutting was widespread practice.<ref>{{Cite web|url=https://www.penn.museum/sites/expedition/the-lapidary-arts-in-islam/|title=Expedition Magazine – Penn Museum|website=www.penn.museum|access-date=2020-03-31}}</ref> Al Beruni also describes the process of diamond grinding using lead plate in the 11th century AD.<ref>{{Cite web|url=https://www.langantiques.com/university/a-history-of-diamond-cutting/|title=A History Of Diamond Cutting {{!}} Antique Jewelry University|language=en-US|access-date=2020-03-31}}</ref> Agastimata, written before 10th century AD, states:<ref>{{Citation|title=Agastimata book|date=2009|work=Dictionary of Gems and Gemology|pages=10|editor-last=Manutchehr-Danai|editor-first=Mohsen|publisher=Springer|language=en|doi=10.1007/978-3-540-72816-0_262|isbn=978-3-540-72816-0}}</ref>
{{Quotation|text=The diamond cannot be cut by means of metals and gems of other species; but it also resists polishing, the diamond can only be polished by means of other diamonds|author=|title=Agastimata|source=}}
A 12th- or early 13th-century diamond ring attributed to [[Muhammad of Ghor|Muhammad Ghauri]] contains two diamonds whose crude octahedral natural states are maintained, but they are in limpid condition, exhibiting diamond polishing and shaping predating Europe, where the first diamond processing dates back to the mid-14th century AD.<ref>{{Cite web|url=https://www.bonhams.com/auctions/10814/lot/293/|title=Bonhams : Two highly important Sultanate gem-set gold Rings made for Mu'izz al-Din Muhammad bin Sam (AH 569-602/ AD 1173–1206), the first Muslim conqueror of Delhi (2)|website=www.bonhams.com|access-date=2020-03-31}}</ref> As of today, few diamonds with ancient Mughal-style faceting are known.<ref>{{Cite web|url=https://gemconcepts.net/mughal-cut-diamonds-the-search-continues/ |title=Mughal Cut Diamonds – The Search Continues|language=en-US|access-date=2024-01-02}}</ref>