Tri-Zact(r) grinding belts

Article Abstract:

Aluminum-oxide Tri-Zact grinding belts from 3M Co. cost approximately $4 each, and are highly effective for lapidary work, especially the finishing grits. A line of carborundum Tri-Zact belts will be introduced later in the year.

Usage, Column, Grinding and polishing, Grinding (Metal finishing), Polishing, Tri-Zact (Grinding tool)

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A closer look at Virgin Valley opal

Article Abstract:

Opals from Nevada's Virgin Valley have a high crumble factor and are found in two major varieties: wood and gel. Tips are presented on buying Virgin Valley opals and on treating and cutting them.

Nevada, Mining industry, Varieties, Opals

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Metalsmith improv: the mighty flex shaft

Article Abstract:

Jewelry-making uses for the flexible shaft machine include cutting, polishing, texturing and shaping. Improvisation tips for using the machine as a mini-lathe are presented.

Flexible shafting

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