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Excerpts from: Brain Press Publications
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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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Show me more articles from: [Brain Press Publications]|[Charles Lewton-Brain]
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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Show me more articles from: [Brain Press Publications]|[Charles Lewton-Brain]
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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Releated Categories:[Patination]

 

[30] Some Polishing and Finishing Aids
For polishing it is recommended to use primarily bristle brushes for most of the removal work and to follow up with a buff where necessary. Feel free to use a lot of compound, it is the compound that does the work, not the buff. Old polishers would have dozens of shaped and turned wooden, leather and even paper shapes and wheels to go on the spindle for different problems.... (1994)
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Show me more articles from: [Brain Press Publications]|[Charles Lewton-Brain]
Releated Categories:[Tools]|[Small Tools]|[Polishing]

 

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