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Articles by Charles Lewton-Brain
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[77] Some Notes On Granulation
Note that while there are many 'secret' recipes and granulation was 'lost' this was as far as I can tell a result of gentleman scholars and acadamics in the late 19th and early 20th century who were too snobbish and ethnocentric to realize that much of the world still does granulation, that peasants across Europe.... (1997)
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[104] Some Notes on making your own polariscope for gemology
Polariscopes are a very useful, simple and inexpensive to make piece of gemological equipment. They are used to tell glass from gem materials synthetic spinel from all other materials, singly refractive from doubly refractive, crystaline from cryptocrystaline material, doublets and triplets from other gems.... (1997)
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Releated Categories:[Gemological Equipment]|[Homemade Tools]

 

[105] Some Notes on Optical Effects in Gemstones
This list introduces some of the terms used in discussing optical effects in gemstones.... (1997)
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Releated Categories:[Gemology]

 

[29] Some Notes on Stakes and Swages
Stakes are objects used for shaping metal over, on and into. Hammers or mallets are used to form the metal over the shape of the stake. Stakes can be made of various materials. A wooden stump can be considered a kind of a stake. Usually in the West most stakes are steel.... (1997)
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Releated Categories:[Tools]|[Small Tools]

 

[80] Some patination information on the Net
Here are some patination sources on the internet. Remember that all patinas are toxic and irritant and should not be worn next to skin unprotected.... (1998)
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