Practical Manual of Minerals Mines And Mining Comprising Suggestions As to Th

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Practical Manual of Minerals Mines And Mining Comprising Suggestions As to Th
Henry Stafford Osborn
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Assumes a violet color on cooling. Where any iron is present the color appears only upon charcoal when treated with metal- lic tin. If made soluble, by fusion with an alkali or alkaline carbonate, in excess of muriatic or nitric acid, with the addition of tin-foil, it gives a beautiful violet color when concentrated, just as in the case of the mineral rutile, which has the same composition. See Titanium.
Mr. C. Leventhorpe mentions the finding at his placer mine, in Rutherford County, North Car
...olina, of a diamond of bad color, which was placed in the Amherst College col- lection.
THE DIAMOND. 249 One was found in a South Carolina placer by Mr. T witty, and one, owned by the latter gentleman, from White County, Georgia. Also in Georgia at the Horshow placer gold mine, Racooche Valley, White County, Georgia, several have been found here.
Also in California from Forrest Hill, El Dorado County, found at a great depth in the auriferous gravel. Another at French Carrol, Nevada County. Four have been found at Fiddletown, Amador t County, in the gray cemented gravel underlying a stratum of so-called lava, or compact ashes.


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