Purple Gold is real: Nile Red makes it work.

[SwordfishMining]

Purple gold is an alloy of Gold with Aluminum. It is hard to work and harder to make. Art Master has a platinum coating that is purple, but it will wear to the white gold it is plated on leaving a purple patina look instead of black.
If you would like to see a creator try to make some and their links.

Special Note:
This ring is a designer exclusive formal jewelry piece. Purple gold (nano ceramic purple platinum coat on 14k solid white gold) will partially wear off within few weeks to few months making your jewelry look exquisite and vintage. As the nano ceramic purple platinum coat wears off, it can not be reapplied. Sale on exclusive nano ceramic gold pieces are final.

Product Description

Luxurious, elegant and classy, the new Modern Vintage 14K Purple Gold 3.0 Carat Amethyst Solitaire Ring R102-14KPGAM evokes, beauty character and style, and is sure to please the most discriminating feminine taste. Terms: 14K Violet Gold, 14K Purple Gold and derivative color styles first introduced to bridal jewelry category trend by Art Masters Jewelry. Includes:

* 1 x over 5.0 grams TW (approx) of cast solid 14K purple gold* (nano ceramic purple platinum coat on 14K white gold)
* 20 x round 0.015 carat (0.30 CTW) natural amethyst gemstones
* 1 x round 3.0 carat natural amethyst center gemstone
* Ring size 7 (United States), N 1/2 (United Kingdom) sizable
* Deluxe jewelry box

https://artmastersjewelry.com/product/m ... 2-14kpgam/