Is a basin located a few hundred meters north-east of the Yadanar-kaday-kadar
mine, at a higher elevation, just below Sinkwa. At Lone-sho, gem mining took place systematically on the valley, floor as well as at the surrounded slopes, using large-scale open-pit mining methods. The mine was closed in 2005.
At Lone-sho rubies
and fewer spinels
are found in different types of marble. In the alluvium, ruby
and some sapphire
are mined using myaw-dwin
method. Magnetite and limonite are found as accessory minerals. The blue sapphires are often of fine quality and large, sometimes attaining 5 cm in length. Rubies with characteristic golden-yellow star are also found.
Ref: Ted Themelis (2008) Gems and Mines of Mogok, p. 257