Jegdalek is a historical and currently active gem deposit in Sorobi District of Kabul Province in eastern Afghanistan, located approximately seventy kilometres east of Kabul on the road to Jalalabad. Jegdalek has produced ruby and pink spinel for at least one thousand years and is one of the older continuously worked gem deposits in central Asia, with material from the area appearing in medieval Islamic and Mughal courts and continuing to enter the international market in modest volumes today.

Geology

The Jegdalek deposit consists of marble-hosted ruby in a metamorphic terrane, similar in geological character to the Mogok and Mong Hsu rubies of Burma. The marble units are part of the Indian-Eurasian collision sequence that has produced gem-quality corundum from the Pamir mountains across through Afghanistan and into the Hindu Kush. Spinel and lapis lazuli from neighbouring Sar-e-Sang and Badakhshan share elements of the same regional geology.

Material

Jegdalek rubies are typically of the medium to dark red, slightly purplish-red colour that distinguishes Afghan corundum, with significant fluorescence under ultraviolet and a characteristic combination of growth-zoning, fingerprint inclusions and small mineral crystals. Crystal sizes are usually small, with finished stones above two carats relatively unusual, and the colour can range from pure pinkish red to a more saturated red comparable to the lower end of the Burmese range. Pink spinel from the same area shares several characteristics with related Pamir and Burmese spinel.

History

Jegdalek material appears in Islamic and Mughal court records and in early European travel accounts. Tavernier in the seventeenth century recorded ruby and spinel from the wider region, although his accounts do not always distinguish Jegdalek from other regional sources. The deposit was worked through the Afghan kingdoms and into the modern period, with significant interruptions during the Soviet period of 1979 to 1989 and during the subsequent civil war and Taliban-era restrictions.

Modern Production

Modern production at Jegdalek is artisanal and small-scale, with material flowing through Pakistani and Afghan dealer networks to the international cutting centres in Bangkok and Jaipur. Volumes are modest by the standards of the Burmese, Mozambican or Thai trades, and Afghan ruby occupies a niche position in the international coloured-stone market valued for its origin story and for the antiquarian connections to medieval and Mughal-period gem use.

Identification

Identification of Jegdalek ruby in the modern laboratory uses the same trace-element and inclusion-feature techniques applied to other origin work, with the GIA and other major laboratories able to distinguish Afghan from Burmese, Mozambican and other origins on the basis of trace-element chemistry and inclusion suite.