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Kadoke-tat (Kadote-dat), Marble Ark, Mogok Township, Pyin-Oo-Lwin District, Mandalay Region, Myanmari
Regional Level Types
Kadoke-tat (Kadote-dat)- not defined -
Marble ArkMining Area
Mogok TownshipTownship
Pyin-Oo-Lwin DistrictDistrict
Mandalay RegionRegion

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Latitude & Longitude (WGS84):
22° 56' 2'' North , 96° 28' 1'' East
Latitude & Longitude (decimal):
Nearest Settlements:
Mogok90,843 (2016)4.7km
Other/historical names associated with this locality:

The gem deposit of Kadoke-tat (Army Fortress) is located in a deep elongated natural marble fissure, long known for its dangerous loos (twisted holes) and caves. This natural fissure is more than 800 meters long and varies in width from ~60 to 100 meters. The fissure runs approximately in a N-NW direction, and is situated at the bottom of the mountain ridge along the Bawpadan road.
By April 1999 the number of mines had fallen considerably, mining became unprofitable. In November 1999 there were only 11 plots in the main fissure, other plots in the adjacent area continued gem mining and by 2002 there were still in operation. In the following years gem mining became more difficult.
A combination of gwè-dwin, lebin and tunelling methods are used to reach the gem-bearing marble bands lying at the bottom of the crevice. The marbles are light green, light blue and yellowish white, lenticular-shaped and usually associated with sphene, scapolite, diopside and pyrite. Ruby, star ruby, diopside and scapolite are found in the loos (twisted holes - loo-dwin) mixed with gravel and soil. - Ted Themelis (2008) Gems and Mines of Mogok

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

Detailed Mineral List:

Formula: Al2O3
Reference: Ted Themelis (2008) Gems & mines of Mogok
Corundum var: Ruby
Formula: Al2O3
Reference: Ted Themelis (2008) Gems & mines of Mogok; Yui, T.-F., Khin Zaw, Wu, C.-M. (2008): A preliminary stable isotope study on Mogok Ruby, Myanmar. Ore Geol. Rev. 34, 192-199.
Corundum var: Star Ruby
Formula: Al2O3
Reference: Ted Themelis (2008) Gems & mines of Mogok
Formula: CaMgSi2O6
Reference: Ted Themelis (2008) Gems & mines of Mogok
Reference: Ted Themelis (2008) Gems & mines of Mogok

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
var: Ruby4.CB.05Al2O3
var: Star Ruby4.CB.05Al2O3
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.

List of minerals arranged by Dana 8th Edition classification

Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Unclassified Minerals, Mixtures, etc.
var: Ruby
var: Star Ruby-Al2O3

List of minerals for each chemical element

O Corundum (var: Ruby)Al2O3
O Corundum (var: Star Ruby)Al2O3
O DiopsideCaMgSi2O6
O CorundumAl2O3
Mg DiopsideCaMgSi2O6
Al Corundum (var: Ruby)Al2O3
Al Corundum (var: Star Ruby)Al2O3
Al CorundumAl2O3
Si DiopsideCaMgSi2O6
Ca DiopsideCaMgSi2O6


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Yui, T.-F., Khin Zaw, Wu, C.-M. (2008): A preliminary stable isotope study on Mogok Ruby, Myanmar. Ore Geol. Rev. 34, 192-199.
Ted Themelis (2008) Gems and Mines of Mogok

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
  • Mandalay Region
    • Pyin-Oo-Lwin District

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