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Deo Darrah (Deo Darra Mts), Khash & Kuran Wa Munjan Districts, Badakhshan, Afghanistani
Regional Level Types
Deo Darrah (Deo Darra Mts)- not defined -
Khash & Kuran Wa Munjan Districts- not defined -

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 36° 23' 17'' North , 70° 50' 27'' East (est.)
Margin of Error:~0km
Köppen climate type:ET : Tundra

Deo Darrah (Persian word meaning Valley of Jin) is an old tourmaline mine.

Blue beryl from this locality was originally described as vorobyevite, however analysis has shown no noticeable Cs level (but with higher levels of Na and Ca) so it is essentially an alkali-rich beryl. See http://www.mindat.org/mesg-11-310231.html and http://www.mindat.org/forum.php?read,105,351767,page=1. Analyses of rosettes of tabular aquamarine from "Kuran, district Wamunjan" (probably from Deo Darrah) reported in Weerth & Weiß (2016) show, apart from Na, increased levels of iron (~1.5 wt.% FeO) and cesium (~0.15 wt.% Cs2O), plus traces of scandium (~0,01 wt.% Sc2O3).

Regions containing this locality

Eurasian PlateTectonic Plate

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Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

4 valid minerals.

Detailed Mineral List:

Formula: Be3Al2(Si6O18)
Habit: Tabular hexagons
Colour: blue to colourless
Description: These were analysed by Federico Pezzotta in Milan and offered for sale by Rob Lavinsky:http://www.irocks.com/galleries/arkenstone-fine-minerals-vorobeyevite-rosterite-gilgit-pakistan. These are Cs rich beryls.
Reference: Ikram Mohammad colllection
Beryl var: Alkali-beryl
Formula: Be3Al2(Si6O18)
Habit: Tabular hexagons, shorted c-axis
Colour: blue
Description: Analysis in 2015 by Anatoly Kasatkin found required Cs was below detection limits. See: http://www.mindat.org/forum.php?read,9,351661,351661,quote=1 This means that there are no Cs beryls here, but there is alkali containing beryl. From the above message thread,"an email from Dr. Pezzotta and Rob Lavinsky from the 2012 finds in Deo Darrah... and Pezzotta mentioned detecting the alkali metal elements Na and K, but not notable Cs in the periphery of the crystals." The 2015 results debunk the vorobyevite claim but do not mention any other alkali metals.
Reference: Rob Lavinsky coll. analized by Federico Pezzota Anatoly Kasatkin, newer analysis in 2015
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Weerth, A. & Weiß, S. (2016): Neues aus der Grenzregion Pakistan/Afghanistan. Lapis, 41 (10), 30-39 (in German).
'Feldspar Group'
Reference: Weerth, A. & Weiß, S. (2016): Neues aus der Grenzregion Pakistan/Afghanistan. Lapis, 41 (10), 30-39 (in German).
Formula: Be2(BO3)(OH)
Reference: Weerth, A. & Weiß, S. (2016): Neues aus der Grenzregion Pakistan/Afghanistan. Lapis, 41 (10), 30-39 (in German).
Reference: Weerth, A. & Weiß, S. (2016): Neues aus der Grenzregion Pakistan/Afghanistan. Lapis, 41 (10), 30-39 (in German).
Formula: SiO2
Reference: Ikram Mohammad Collection
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Ikram Mohammad colllection

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Group 6 - Borates
Group 9 - Silicates
var: Alkali-beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
Unclassified Minerals, Rocks, etc.
'Feldspar Group'-

List of minerals arranged by Dana 8th Edition classification

Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Six-Membered Rings with borate groups
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
var: Alkali-beryl
var: Aquamarine-Be3Al2Si6O18
'Feldspar Group'-

List of minerals for each chemical element

H HambergiteBe2(BO3)(OH)
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Alkali-beryl)Be3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be HambergiteBe2(BO3)(OH)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
B HambergiteBe2(BO3)(OH)
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O BerylBe3Al2(Si6O18)
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O QuartzSiO2
O Beryl (var: Alkali-beryl)Be3Al2(Si6O18)
O Beryl (var: Aquamarine)Be3Al2Si6O18
O HambergiteBe2(BO3)(OH)
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Alkali-beryl)Be3Al2(Si6O18)
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si BerylBe3Al2(Si6O18)
Si QuartzSiO2
Si Beryl (var: Alkali-beryl)Be3Al2(Si6O18)
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Ikram Mohammad (2014) personal communication
Weerth, A. & Weiß, S. (2016): Neues aus der Grenzregion Pakistan/Afghanistan. Lapis, 41 (10), 30-39 (in German).

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Localities in this Region
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  • Badakhshan
    • Khash & Kuran Wa Munjan Districts

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