Search Results

Fine Jewelry University

1. 

   Gem in the Spotlight: Ruby

   FJU Category: Gemstones | Tags: Folklore, Gem Spotlight, Gemology, Ruby

   … index of 1.762-1.770 and a specific gravity of 4.00. A unique optical property of rubies is that they emit fluorescent light at a very specific wavelength (694 nanometers) under certain conditions. Scientists used this fact to build …

2. 

   The Difference Between White Gold and Platinum

   FJU Category: Jewelry Metals | Tags: Gold Information, Gold Purity, Plating, Platinum Jewelry, Star White Gold

   … to 5 times more than white gold. Why? Platinum has a higher noble metal percentage in jewelry. Platinum is harder to work with than white gold. The higher melting temperature makes it more difficult to cast. The platinum solders also flow at higher temperatures. These and other reason make platinum more expensive to work with than white gold. So, the labor cost of platinum jewelry is more also. Want to see some real-life jewelry in these different metals? You can …