Pink and purple! Amethyst set in 18k rose gold -- love the combo -- and this style can be (and has been) redone in a number of gem/gold colour combinations (the second picture also shows an amethyst/white gold combo). The amethyst is a natural 4.5 ct stone and the ring weighs about 8 grams. Contact me for more gem possibilities.
Disegno loves the Pronghorn style and we almost always have a version or two of this in stock that has not yet been photographed, including an over-sized Pronghorn (Bighorn!) using this buff top Citrine: