This 19th century ritual headdress is known as a Perak, from Ladakh, Tibet.
In the shape of a hat with arched flap, richly applied overall with various sizes of turquoise, coral, mother-of-pearl, wood, and various stone beads, centered by a silver roundel inset with turquoise, the flap terminating with a silver heart shape medallion. Size: 10” high x 9-3/4” wide (23.5” full width)
A similar one sold at Christies 1998, New York Sale 8962
The perak is a symbol amongst the Ladakh people of Tibet, displaying the rank and economic status of the woman wearing it. The jewels are representative of the Ladakh deities, protecting and guiding the wearer through the dangerous human world.