A CHINESE ROBIN'S EGG-GLAZED PEAR-SHAPED VASE.A CHINESE ROBIN'S EGG-GLAZED PEAR-SHAPED VASE. Qing Dynasty, four character Yongzheng mark and probably of the period. The globular pear-shaped body rising from a spreading foot to an elegantly waisted neck and a wide flaring mouth, the widest part of the body, the neck and below the rim moulded with a triple bow-string, all covered with a mottled glaze ranging from pale blue through turquoise to purple, wood stand, 21cm H. (2) 清約雍正 爐鈞釉蚰弦纹赏瓶，「雍正年製」款 The form of this vase with a lipped mouth and several bow-strings decorating the long cylindrical neck is recorded in examples in a flambe glaze with examples published in Kangxi, Yongzheng, Qianlong: Qing Porcelain from the Palace Museum Collection, 1989, cat no 108, and Gugong bowuyuan cang Qing dai yu yao ci qi. Juan yi, 2005, cat no 130 and 134. The Robin’s-egg glaze was a monochrome glaze first invented in the Yongzheng reign. One of the most notable features of this type of glaze is the variation of the mottling that can be achieved. An example of a related vase with a more compressed body and more widely flaring neck was sold Christie’s, 30 November 2011, Important Chinese Ceramics and Works of Art, lot 3303.