where to find info on color shades of pink-gold, about goldsmith?????????????

Answer 1

Rose gold (also known as pink) and yellow gold are created by varying the amount of copper in a copper/silver mixture that is added to the gold. The more copper in this alloy, the more rose the gold appears.
http://education.jlab.org/itselemental/ele079.html
http://windlesjewelry.com/Plethora/GoldAlloys/aualloys.htm
http://www.gold.org/jewellery/technology/alloys/index.html
http://www.goldsmith.it/us/culturale/storia/lemani/storiamani.html
http://www.24carat.co.uk/whatisrosegoldframe.html
http://en.wikipedia.org/wiki/Goldsmith