这一概念，集体上扬

Core Viewpoint - The superhard materials sector has experienced a significant surge, with multiple stocks showing substantial gains on December 3rd, indicating a strong market interest and potential investment opportunities in this industry [1]. Group 1: Stock Performance - Sifangda's stock price increased by 15.82%, reaching 17.86 [2] - Huifeng Diamond's stock rose by 12.18%, reaching 37.38 [2] - Huanghe Xuanfeng's stock hit the daily limit, increasing by 10.08% to 6.77 [2] - Liliang Diamond's stock grew by 8.02%, reaching 40.40 [2] - Other notable performers include World (up 5.59% to 68.00), Guojijiangong (up 5.08% to 34.32), and Boyun New Materials (up 1.64% to 9.91) [2].