China, Cenxi, autonomous region Guangxi

Černé Vodě, Jeseníky

Keelaiyur, Nagapattinam district, Madurai, Tamil Nadu

Chamrajnagar, southern end of Karnataka

Changle, eastern Fujian province

Fujian province

St. Cloud, Minnesota

Greer County, Lawton, Oklahoma

Sinai

Chelmsford Grey Quarry ,140 acres located off route 40 in Westford, Massachusetts

Yanshan District, Chengde, Hebei province

Karimnagar, Andhra Pradesh

Karnataka

Virudhunagar District, Sivakasi, Tamil Nadu

Jalore, Rajasthan and Kushki, Sabarkantha, Gujarat

Neimenggu, Inner Mongolia

Guangdong