Over 60 priceless pieces of Ru kiln porcelains are on display in Beijing. The Ru wares, listed as an intangible cultural heritage of China by the UNESCO, date back to the Northern Song Dynasty some one thousand years.

The Ru kiln ceramics is known for their signature aquamarine or turquoise glaze that covers the entire body. Ru ceramics reached a zenith when emperor Huizong of the Northern Song Dynasty ruled some one thousand years ago.

Emperor Huizong was well acquainted with ceramic-crafting techniques and he had gone to great lengths to produce pieces that exactly suited to his aesthetic sensibilities. He personally oversaw the selection of craftsmen and materials involved in porcelain production, resulting in pieces that were exquisitely fashioned.

Over 60 priceless pieces of Ru kiln porcelains are on display in Beijing.

Expert says what makes the Ru porcelain unique is that the glaze on its body varies from time to time, staying sensitive to different weathers.

The Ru porcelain was produced on a small scale within a period of twenty years, and artisans conversant in its production techniques were very few. That's why Ru porcelains are those most sought after by ceramics collectors and fetch high prices at auctions.