Sapphires in Laos have come from great depths in the earth and are found in gem gravel created from eroded alkali basalts. In general, blue, green, and yellow sapphires from Laos have properties and characteristics similar to those of sapphires from other alkali basaltic sources. In most cases, these sapphires can be readily distinguished from metamorphic sapphires by their higher iron content. The presence of iron also influences other gemological features and characteristics such as spectra, chemistry, and the type of mineral inclusions.
Laos’ most famous sapphire mine, Ban Houay Xai, has been worked sporadically since the late 19th century, but it was closed in 2000 due to charges of corruption, and significant production has not resumed. Small-scale mining is reportedly occurring in the region however, as well as other locations around the country. In many instances, farmers dig huge holes in the middle of their rice paddies with the hope of finding a fortune in gemstones.
Vietnam and Laos on March 10 signed a contract to cooperate in ore mining and processing in Houaphan province of Laos.
Attending the signing ceremony were Lao Deputy Minister of Planning and Investment Thongmy Phomvisay and Vietnam’s Tien Hieu Minerals and Trade Joint Stock Company Chairman Bui Tien Em.