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Feldspars: Moonstones and Labradorite - By Sondra Francis
The feldspars are a group of related minerals which, as a group are the most abundant minerals in the earth's crust. However, only a tiny percentage of the feldspars fall in the "gem quality" range. The members of the feldspar group have similar chemisty, but some have different crystal structures....
Tags: | Handbook for the Gem Buyer | Gemstones Information |
Heavy Metal, Tips For Working With Testing Labs - By Tina Wojtkielo
Before you submit any jewelry item to a lab to test for heavy metals, you´re going to need to do a little homework. Current state and federal laws regulating lead and cadmium levels in jewelry have mounted hurdles that jewelry makers must clear -- and some of those laws pertain to both...
Tags: | Jewelry Mass Production | Metallurgy |
Manufacturing a Sterling Silver with Platinum Bracelet - By Mark B. Mann
To demonstrate how pulse-arc welding performs on sterling silver, this bracelet was cast, finished and assembled without the use of a torch. The six links immediately adjacent to the clasp on the bracelet are made with a common sterling silver alloy and the other five are made using the new sterling...
Tags: | Platinum Fabrication | Fusing & Welding |
Matter into Metaphor - Transformation in Asian and Western Metals - By Celia Rabinovitch
The origins of metallurgy are shrouded in mystery, contributing to the mythology that dev eloped around the metalsmith's art. With some variations this tradition existed in ancient China , Africa , and Europe but stemmed from roots so archaic as to arise from a basic principle....
Tags: | Features |
Bulk finishing of gold jewellery - I Wet tumbling: basic principles - By Manfrid Dreher
The correct use of modern, semi- automated finishing processes enables the manufacturer not only to reduce production costs, but also to improve the quality of finish on jewellery produced in series. This is the first of several articles, originally published in AURUM in 1982 on this important...
Tags: | Jewelry Mass Production | Tumbling |