* Texas says Cemex owes at least $558 mln in royalties
* Lawsuit latest concern for debt-laden Mexican company
* Cemex says sand, gravel not subject to royalties (Recasts; adds background, Cemex debt details)
By Robin Emmott
MONTERREY, Mexico, June 23 (Reuters) – The U.S. state of Texas said on Tuesday it filed a lawsuit against Mexico’s Cemex SA for $558 million in royalties owed in the United States, the latest headache for the debt-laden cement maker.
Texas Land Commissioner Jerry Patterson said Cemex (CMXCPO.MX)(CX.N), the top cement maker in the United States, was mining a quarry near El Paso, Texas, without paying royalties to the owner, the state’s Permanent School Fund.
