Examples from literature

• He pointed a long forefinger at the empty glass. 
• He was balancing a spoon on his forefinger, and smiling with quiet amusement. 
• I'll tell you what it is, my boy, he accused, with lifted forefinger. 
• She took it gingerly between her thumb and forefinger. 
• She touched her red lips with the tip of her forefinger, opened her hands, and shrugged her shoulders with a sad gesture of regret.