A CONG-FORM ALTERED JADE BEAD, LIANGZHU CULTURE China, circa 3300-2200 BC. The tubular bead is carved in the form of a two-tiered miniature cong. Both registers are carved with a stylized mask at each of the four corners. The opaque stone is covered extensively with white alteration. Provenance: From a private estate in New York City, USA. Condition: Very good condition with minor wear, a small chip to one side which has smoothened over time. The stone with natural fissures, some of which may have developed into small hairline cracks over time. Weight: 16.2 g Dimensions: Length 3.8 cm Auction result comparison: Compare a closely related cong-form jade bead, of identical size and near-identical design and with very similar white alteration, at Christie's Hong Kong in The Chang Wei-Hwa Collection of Archaic Jades, Part I - The Neolithic Period on 27 November 2019, lot 2723, sold for HKD 525,000. 良渚文化琮形玉珠 中國，約公元前3300至2200年。中國，約公元前3300至2200年。玉珠被雕刻成琮形，四個角獸形面具紋。 不透明的玉料上大面積鈣化。 來源：美國紐約私人收藏。 品相：狀況極好，輕微磨損，一側有一個小磕損，隨著時間的推移已經變得平滑。帶有天然裂縫的石料，隨著時間的推移，其中一些可能會發展成細小的裂縫。 重量：16.2 克 尺寸：長 3.8 厘米 拍賣結果比較：一件相近琮形玉珠，幾乎相同尺寸、設計以及極其相似的白色蝕變，見香港佳士得The Chang Wei-Hwa Collection of Archaic Jades, Part I - The Neolithic Period 2019年11月27日, lot 2723, 售價HKD 525,000。