White Gold Diamond and Colombian Emerald Earrings

White gold : White gold is an alloy of pure gold with copper, Zinc, Palladium or nickel.
Emerald cut : This square or rectangle cut was developed to address natural weakness of emeralds due to the high quantity of inclusions it contains. It is widely used to cut other gemstones than diamond.
Diamond : In mineralogy, diamond is an extremely rare, precious and hard (named after the ancient Greek "unbreakable") metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice.