There is no such thing as black gold. Most probably this is "gold" or base metal plated with black rhodium, a metal from the platinum family. Do your homework before you buy to make sure you're not falling for a fake.
Purdue University's school colors are old gold (more of a gold color than a yellow) and black.
Yellow gold is more expensive.
Pure yellow gold is more expensive than an alloy.
yellow gold
The Answer Is No there are more yellow metals
About 1.4 times more costly than Gold.
You can not really turn white gold into yellow gold. It is more the other way around. White gold is a mixture of yellow gold and palladium. If you are interested is more information you should visit this sight. http://www.dgse.com Hope this helped!!
Sulfur and gold are both yellow minerals. Topaz is a yellow gemstone, which I believe would also be considered a mineral. Pyrite, more commonly known as "fools' gold" is also yellow, and is technically an iron sulfide. Yup! SULFUR!
The difference is that the black on is more powerful then the yellow.
Rose gold is better and could be expensive because it is rare but its only a mixture of yellow gold and copper. but the color could go bad if any perfumes or cremes are accidentally put on it. Yellow gold (pure gold) is more expensive than an alloyed gold.
It can be more collectable, but not necessarily more expensive, in antique jewellery.
the yellow beak gold wallow