Post AlBwc9RoIzRIw7sIXw by istvan@poa.st
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 (DIR) Post #AlBwc9RoIzRIw7sIXw by istvan@poa.st
       2024-08-21T12:30:08.344401Z
       
       0 likes, 1 repeats
       
       Jó napot! Our daily gem is “Eighteen Segment Navette” by Norman W Steele.It is a marquise of 71 facets with 2-fold mirror symmetry. It requires a 72-index gear.The refractive index is 1.54. Compatible gems include: iolite, sunstone, chalcedony (moss agate, chrysoprase), quartz (amethyst, prasiolite, citrine).Published in Facet Design v2 (1979), pC37.dragako.brainsocks.xyz/pc03046.asc#gemcutting #faceting #lapidary