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2. Engagement ring - Wikipedia

   en.wikipedia.org/wiki/Engagement_ring

   The most common setting for engagement rings is the solitaire prong setting, which was popularized by Tiffany & Co. in 1886 and its six-claw prong setting design sold under the "Tiffany setting" trademark. The modern favorite cut for an engagement ring is the brilliant cut, which provides the maximum amount of sparkle to the gemstone. [46]

3. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Since the per carat price of diamond shifts around key milestones (such as 1.00 carat (200 mg)), many one-carat diamonds are the result of compromising cut for carat. Some jewelry experts advise consumers to buy a 0.99-carat (198 mg) diamond for its better price or buy a 1.10-carat (220 mg) diamond for its better cut, avoiding a 1.00-carat (200 ...

4. Ring size - Wikipedia

   en.wikipedia.org/wiki/Ring_size

   Ring size is a measurement used to ... N + 1 ⁄ 2: 14: 14: 14.4 0.69: 17.53: 2.17: 55.1: 7 + 1 ... the ring may need to be cut open and material either added or ...

5. Diamond - Wikipedia

   en.wikipedia.org/wiki/Diamond

   Splitting a diamond with a hammer is difficult, a well-calculated, angled blow can cut the diamond, piece-by-piece, but it can also ruin the diamond itself. Alternatively, it can be cut with a diamond saw, which is a more reliable method. [110] [112] After initial cutting, the diamond is shaped in numerous stages of polishing.

6. Koh-i-Noor - Wikipedia

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

   When Queen Victoria showed the re-cut diamond to the young Maharaja Duleep Singh, the Koh-i-Noor's last non-British owner, he was apparently unable to speak for several minutes afterwards. [ 61 ] The much lighter but more dazzling stone was mounted in a honeysuckle brooch and a circlet worn by the queen. [ 8 ]

7. Cup and ring mark - Wikipedia

   en.wikipedia.org/wiki/Cup_and_ring_mark

   Sardinia is rich in cup-and-rings stones. The best known is the Perda Pintà (the 'painted stone', which is carved, not painted) or Stele di Boeli, [22] at Mamoiada: an impressive stele or menhir 2.67 metres (8 ft 9 in) high with various concentric circles patterns crossed by engraved channels and central cup-marks. [23]