Occurrences of gem ruby and sapphire in Thailand are located in the provinces of Chanthaburi-Trat, Kanchanaburi, Phrae-Sukhothai, Ubon Ratchathani, Si Sa Ket, and Phetchabun (figure 1). However, a few ...

Since the late 1980s, sapphire mines in southern Vietnam have supplied significant quantities of gem materials to the jewelry industry (figure 1). Commercial gem mines in southern Vietnam have been ...

Seawater has intruded into many of Saudi Arabia’s Red Sea coastal aquifers, with varying degrees of extension depending on location, hydrogeology, and population density. This study aimed to evaluate ...

1 Baoding Central Seismic Station of Hebei Province, Baoding, China. 2 Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards, Xingtai, China. The occurrence and development of ...