Unimin Corp Claim Listing Return to Directory Rating (average) (0) Business Genre Manufacturing, Stone Business Website Address unimin.com Business Address, City PO Box 58, Hamilton ZIP Code 98255 Business Phone Number 3608263765 Business Fax 3608264772 Ratings There are no reviews yet. Please login to leave a review. Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password? Reader Interactions Leave a Reply Cancel replyYou must be logged in to post a comment.