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https://www.callagold.com/problem-solving/re-tipped-prongs-porosity-rings/
Porosity in Cast Gold Ring. While the small dimples on the surface of a jewelry piece can look ugly, the real danger of porosity comes from the structural damage the bubbles cause as they expand beneath the surface. These bubbles weaken the structure of …
http://technical-articles.hooverandstrong.com/wordpress/porosity-the-jewelers-nightmare/
Jun 01, 1999 · Gas porosity can be scattered throughout a piece of jewelry, making it brittle and prone to breaking. It often appears as blotches in highly polished areas. Magnification reveals these blotches as holes. Because the metal is porous and contains holes, it’s harder to polish and may appear darker than non-porous metal.
https://www.quora.com/What-can-we-do-about-my-wifes-porous-gold-ring-we-only-found-out-3-5-yrs-after-purchasing
Well, unless the jeweler from which you purchased it is willing to do something, about all you can do is buy another ring (after careful examination!) and have the stone (s) reset in it. Unless the porosity is really obvious—and it must not be or you’d have noticed it sooner than three years—just ignore it and continue to wear it.
https://columbiajewelers.net/collections/portuguese-jewelry
Home / Portuguese Jewelry. Portuguese Jewelry. View as Featured. Featured; Price: Low to High; Price: High to Low; A-Z; Z-A; Oldest to Newest; Newest to Oldest; Best Selling; Sale. 1983 - 19.2K Portuguese Gold Solid Frizo Bracelet. $4,244.50 $6,530.00. 19.2K Portuguese Gold Solid Frizo Bracelet with Box and figure eight safe clasp Approx ...
http://professionaljeweler.com/archives/articles/1999/jun99/0699fys1.html
Gas porosity can be scattered throughout a piece of jewelry, making it brittle and prone to breaking. It often appears as blotches in highly polished areas. Magnification reveals these blotches as holes. Because the metal is porous and contains holes, it's harder to …
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