Diamond Materials Inc Claim Listing Return to Directory Rating (average) (0) Business Genre Contractor, Highway Business Website Address diamondmaterials.tripod.com Business Address, City 924 S Heald St, Wilmington ZIP Code 19801 Business Phone Number 3026586524 Business Fax 3026580684 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?