Jewelry Design Van Gogh's Gladioli Necklace by Larissa Moraes Van Gogh's Gladioli is a handmade necklace inspired by a flower painting by Vincent van Gogh. The necklace is made of 18 karat gold and set with natural gemstones, including light citrine, ruby and morganite. The variety of the flowers is shown through the different hues and colors of the stones. Delicate carvings in the gold represent the midrib and the veins of the leaves. The contours follow the asymmetry and the balance found in nature. The piece is lightweight and comfortable to wear.