Turquoise
Turquoise is a greenish blue semi-precious stone that has been used since ancient times, both as an amulet and a symbol of wealth.
Made of turquoise and gold, the world's oldest known bracelet was discovered on the arm of the ancient Egyptian Queen Zer, whose tomb was excavated in 1900. It dates from 5500 BCE.
The name turquoise comes from the French word for Turkish, as the stone likely came into Europe by way of Turkey.
In the new world, the Incas made beautiful turquoise jewellery, as for example the museum pieces shown here at the Museo Larco in Lima.
Using stones found in central Mexico, the Aztecs also produced ornate and detailed masks like these.
Photo: Gemselect