Provenite

Adun-Chelon (Adun-Cholon) massif

AreaClosedDraft data

50.5507° N, 116.1898° E · ± 10 km

Aquamarine from Zabaykalsky Krai, Russia, with photos of specimens from this locality.

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Minerals found here

Aquamarine

Aquamarine at Adun-Chelon (Adun-Cholon) massif

Old aquamarine crystal 3 cm long from the Adun-Cholon range near Nerchinsk, Transbaikalia, Russia.
Old aquamarine crystal 3 cm long from the Adun-Cholon range near Nerchinsk, Transbaikalia, Russia.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Zoned blue-green aquamarine crystal 3.4 cm long from the Adun-Cholon pegmatites, Transbaikalia, Russia.
Zoned blue-green aquamarine crystal 3.4 cm long from the Adun-Cholon pegmatites, Transbaikalia, Russia.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
Be₃Al₂Si₆O₁₈
Morphology
Slender prismatic crystals, some colour-zoned
Typical size
About 3-3.5 cm
Color / luster
Blue to blue-green, zoned
Associated minerals
Topazsmoky quartzmuscovitefeldsparwolframitecassiteriteapatite
Availability
Scarce
History
Aquamarine and topaz were found here in 1723 by the Nerchinsk Cossack Ivan Gurkov; the gems were worked by the Nerchinsk Works administration from the 1770s

Sources: SRC-779 SRC-780 SRC-266

About Aquamarine →

Geology of the locality

Setting
Field of chamber (miarolitic) pegmatites in tin-, tungsten-, beryllium-, fluorine- and boron-rich granites
Host rock
Granite
Region
Zabaykalsky Krai
Country
Russia

Coordinate is the massif from the Russian Wikipedia article.

Sources: SRC-779

Sources

  1. SRC-779 · Website
    Адун-ЧелонWikipedia contributors · Wikipedia (Russian)
  2. SRC-780 · Website
    File:Beryl-280544.jpgRobert M. Lavinsky · Wikimedia Commons
  3. SRC-266 · Book
    Handbook of Mineralogy - BerylAnthony, J.W.; Bideaux, R.A.; Bladh, K.W.; Nichols, M.C. · 2001 · Mineralogical Society of America / Mineral Data Publishing

Draft data from the Provenite workbook. Check entries against the cited sources before relying on them. Photos are open-licence images from Wikimedia Commons; the author and licence are given with each photo.