A Topaz and Diamond Pendant, by Wallace ChanThe 'Wallace-cut' rectangular faceted blue topaz intaglio, depicting a female profile, the frame accented by brilliant-cut diamonds, topaz approximately 16.95 carats, signed, length 3.5cm注脚凹版雕刻托帕石配鑽石吊墜,陳世英
托帕石共重約16.96克拉

The "Wallace Cut" was invented by Wallace Chan in 1987, a technique that combines the methods of medieval cameo and intaglio carvings into three-dimensional engravings, to create reflective illusions of an image in transparent materials. The technique unifies these features using precise calculations and angle casting resulting in the multiple reflection effects. This unprecedented carving technology was honoured with the Hong Kong Jewellery Design Grand Award. It was this unique, unconventional carving method that confirmed Wallace Chan's status as a master sculptor.

1987年，陳世英發明了"世英切割"，它是結合中世紀浮雕及凹版的三維雕刻技術。在雕刻透明材料時經精確計算角度後而產生三維多面反射錯覺効果。這是一種前所未有的雕刻技術，更獲得當時的香港珠寶設計大獎。這種獨特及非傳統的雕刻方法,證實了陳世英作為一個雕刻大師的重要地位