This is a Chinese traditional jewelry accessory called the Blueing Bangle.

It is made of ox horn and has a blue and green color scheme.

The bangle is adorned with intricate designs and patterns, showcasing the artistry and skill of the craftsmen who created it.

The blueing process involves dyeing the horn in shades of blue, creating a unique and beautiful piece of jewelry that is both functional and decorative.

The National Hanfu Ox Horn Bracelet for Women is a perfect example of this traditional art form, combining the beauty of ox horn with the elegance of traditional Chinese clothing.

It is a symbol of cultural heritage and craftsmanship, reminding us of the rich history and traditions of China.