The eye-catching ancient jewellery was discovered on the skeletons of female invaders from the nomadic Xiongnu warrior people who lived by the Yenisei River in remote Tuva republic. One belt buckle made of coal (bottom right) is intriguingly encrusted with semiprecious carnelian, jade, coral and turquoise. On the items of coal jewellery there are engravings of two goats and arrows that pierce them, and on the reverse side, a horse (top right). Others unearthed at the Ala-Tei burial ground on the Yenisei River in remote Tuva republic had engravings of animals (left). Men had decorative buckles made mostly of iron, but it is the black coal decorations - up to 20 centimetres (8 inches) in diameter - that impressed archaeologists the most.