1. Porcelain Huang Gaobao is a very precious gem with high collection value and investment potential. Porcelain yellow Aobao not only represents Australia's national stone and cultural symbol, but also is the heart of Opal lovers and jewelry collectors.

2. Porcelain yellow opal is a very rare and beautiful color-changing opal. Its background color is porcelain yellow, shining with red, green and blue colors. It is a specialty of South Australia, Australia.