General guide to the exhibition halls of the American Museum of Natural History . orgcnthau THE TOPAZ Altharc fou TOPAZ lough gem crystals of the mineral topaz rayed star which glows within the gemfound in a varietv of yellow, orange and suits from a myriad of minute hollow ti re-tubes blue shades, the deep orange-yellow color, which arc distributed throughout the crystalresembling sherry wine, is generally ac- with great regularity, parallel to its six sides [30] THE EDITH HAG-GIX DE LONG STARRUBY. This unusual-ly beautiful star rubyis reputed to be thelargest and finest gemof its kind in the
General guide to the exhibition halls of the American Museum of Natural History . orgcnthau THE TOPAZ Altharc fou TOPAZ lough gem crystals of the mineral topaz rayed star which glows within the gemfound in a varietv of yellow, orange and suits from a myriad of minute hollow ti re-tubes blue shades, the deep orange-yellow color, which arc distributed throughout the crystalresembling sherry wine, is generally ac- with great regularity, parallel to its six sides [30] THE EDITH HAG-GIX DE LONG STARRUBY. This unusual-ly beautiful star rubyis reputed to be thelargest and finest gemof its kind in theworld. It weighs ioocarats and was discov-ered in one of therubv mines of color is a peculiarorchid-red. A remark-able six-rayed starglows within the gem,formed from a myriadof minute hollow tubeswhich are distributedthroughout the crvstalwith great regularity,parallel to its six stone has been cutin a rounded dome, theshape which best re-flects the light from theinterior. It was pre-sented to the Museumby Mrs. George BowenDe Long, in whosehonor it is named. When cut en cabochov, so that the roundeddome arches over this hexagonal pattern ofcavities, stones of this kind reflect the lightfrom the interior as a six-rayed star and con-sequently they are termed star rubies andstar gem, weighing ioo carats,was discovered in one of the ruby mines ofBurma and was presented to the Museum bvMrs. George Bowen De Long, in whosehonor it is named. It is unique among starrubies, being larger than any other remotelyapproaching it in quality. GEOLOGY AND MINERALS OFNEW YORK STATE Two cases illustrating these features are ex-hibited on the first floor of the RooseveltMemorial (Index Plan, p. 16, First Floor,Hall 12). One case shows the principal min-erals characteristic of the State and the lo-calities where they may be found. The otherdemonstrates the extent of the sedimentary,igneous, and metamorphic areas within theborders of the State. C3O
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Keywords: ., bookcentury1900, bookdecade191, booksubjectnaturalhistorymuseums
