A turquoise-blue glass bottle vase. Wheel-cut mark and period of Qianlong. Photo Sotheby's

the ovoid body surmounted by a long cylindrical neck ending in a sharply cut straight mouth, the glass of turquoise-blue colour and polished to a smooth gloss, with a four-character wheel-cut mark to the recessed base, 24 cm., 9 1/2 in. Estimate 250,000—350,000 HKD. Lot Sold 680,000 HKD

A Turquoise-blue glass vase. Wheel-cut mark and period of Qianlong. Photo Sotheby's

of elegant pear-shaped form, rising from a short straight foot to a tall waisted neck and a flared rim, the glass of a brilliant turquoise color, a wheel-cut four-character mark to the base; 27.5 cm., 10 3/4 in. Estimate 200,000—300,000 HKD. Lot Sold 225,000 HKD

A red glass olive-shaped vase. Wheel-cut mark and period of Qianlong. Photo Sotheby's

the rounded ovoid body rising gently from a flaring foot to a tall neck, the transparent glass of orange-red colour, inscribed with a four-character wheel-cut mark to the base; 18.4 cm., 7 1/4 in. Estimate 200,000—300,000 HKD. Lot Sold 225,000 HKD

A pink glass vase. Qing Dynasty, Qianlong period. Photo Sotheby's

of bottle form, the globular body surmounted with a long cylindrical neck, the glass opaque pink colour; 26.4 cm., 10 1/2 in. Estimate 120,000—180,000 HKD. Lot Sold 137,500 HKD

Sotheby's, Chinese Ceramics & Works of Art, 08 Apr 11, Hong Kong www.sothebys.com