The gold in pure form is only yellow, but when you alloy it with another metals his color change depending on which metal join the mix, we can get different colors, the most common colors are, white, yellow and red, other colors like gray, green and blue are possible to create. Depending on the gold...

Emeralds have been great companions and one of the most important gemstones in gold jewelry, in some cultures they represent hope or opulence. Emeralds are precious stones with very different shades and intensities, but their value depends largely on their transparency since it is more common to see...