鑑 expert opinion

The economist had an expert opinion on how to oversee gold.

chop / seal ★★★☆☆
印 (stamp) + 鑑 (expert opinion) = 印鑑 (chop / seal)

one's seal or stamp with one's name on it, which the Japanese use instead of signatures.

a field guide ★★☆☆☆
図 (diagram/ map) + 鑑 (expert opinion) = 図鑑 (a field guide)

a field guide; a book where each page has one picture and a description of a thing. (birds, gandams, monsters, doinks, whatever).

discriminating eye ★☆☆☆☆
鑑 (expert opinion) + 賞 (prize) = 鑑賞 (discriminating eye)

to have a 'discriminating eye' for art. To appreciate art or music on some deep, expert level.

expert opinion ★☆☆☆☆
鑑 (expert opinion) + 定 (plan) = 鑑定 (expert opinion)

expert opinion. Like an American Idol judge or art critic or some guy in court who says that tobacco does/does not cause cancer.