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2. Gold cluster - Wikipedia

   en.wikipedia.org/wiki/Gold_cluster

   Gold clusters, a part of cluster chemistry, is a term used to describe molecular clusters of gold or larger colloidal particles. Both types can described as nanoparticles, with diameters of less than one micrometer. [1] Gold nanoclusters have, despite intense efforts, as yet no commercial applications.

3. Diamond - Wikipedia

   en.wikipedia.org/wiki/Diamond

   Diamonds can be sold already set in jewelry, or sold unset ("loose"). According to the Rio Tinto, in 2002 the diamonds produced and released to the market were valued at US$9 billion as rough diamonds, US$14 billion after being cut and polished, US$28 billion in wholesale diamond jewelry, and US$57 billion in retail sales. [110]

4. Thiolate-protected gold cluster - Wikipedia

   en.wikipedia.org/.../Thiolate-protected_gold_cluster

   Top left: full structure; middle : only gold core and Au-S shell displayed, bottom right: only Au 13-core displayed. Thiolate-protected gold clusters are a type of ligand-protected metal cluster, synthesized from gold ions and thin layer compounds that play a special role in cluster physics because of their unique stability and electronic ...

5. Dieges & Clust - Wikipedia

   en.wikipedia.org/wiki/Dieges_&_Clust

   A 1936 New York Yankees World Series ring cast by Dieges & Clust and owned by Lou Gehrig held the record sale price for such a ring at $17,500. [ 10 ] In 1999, Sotheby's sold what was believed to be Lou Gehrig's 1927 ring for $96,000.

6. Goldstone (glass) - Wikipedia

   en.wikipedia.org/wiki/Goldstone_(glass)

   Goldstone Goldstone glass under magnification. Goldstone is a type of glittering glass made in a low-oxygen reducing atmosphere.The finished product can take a smooth polish and be carved into beads, figurines, or other artifacts suitable for semiprecious stone, and in fact goldstone is often mistaken for or misrepresented as a natural material.

7. Nickel - Wikipedia

   en.wikipedia.org/wiki/Nickel

   Nickel is the top confirmed contact allergen worldwide, partly due to its use in jewelry for pierced ears. [147] Nickel allergies affecting pierced ears are often marked by itchy, red skin. Many earrings are now made without nickel or with low-release nickel [148] to address this problem.