22 Anonymous In: Question-Answer In which state is the only active diamond mine in the U.S.? 22 In which state is the only active diamond mine in the U.S.? Arizona Arkansas Minnesota Idaho 1 Answer Voted Oldest Recent Random Best Answer Goto 2021-01-08T17:18:11+00:00Added an answer on January 8, 2021 at 5:18 pm The correct answer is Arkansas. 14 Reply Share Share Share on Facebook Share on Twitter Share on WhatsApp Leave an answerLeave an answerCancel reply Featured image Select file Browse Click on image to update the captcha. Save my name, email, and website in this browser for the next time I comment.