PAIR of gold pendant earrings

Grey gold : Grey gold is obtained by adding silver, manganese and copper in specific ratios to the gold alloy.
Amethyst : Amethyst is a popular form of quartz that ranges from a bright to dark or dull purple color. Heated the color of the amethyst changes to yellow and is then called citrine.
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.