In the lowlands of Dattaw and on the adjacent ridge at Dattaw-pyant (Plains of Dattaw) as well as in the small creek Dattaw-chaung (Dattaw Creek) flowing downhill many gems are recovered from eluvial and alluvial deposits.
In 1998 there were 3 joint ventures working in small-scale, open-pit schemes at Dattaw-pyant. In 1999 gem mining operations expanded producing mostly small size rubies
and few sapphires
from the alluvium. The gems were recovered after washing the byôn
at the nearby small creeks flowing down the ridge. Gem mining ceased in 2001.
Further north of the ridge 2 joint ventures are mining the alluvium in open-pit mining schemes producing ruby
, some sapphire
(near colorless, purple, blue), lapis lazuli
, green/blue apatite
, pink scapolite
, cat's eye scapolite, diopside
, cat's eye diopside, moonstone
with golden sheen and zircon
associated with spinel
Ref: Ted Themelis (2008) Gems and Mines of Mogok, p.204