Badakhshan is the mountainous province of north-east Afghanistan, lying along the Tajikistan border and extending into the Wakhan Corridor that reaches toward China and Pakistan. Within the province, in the Sar-i Sang valley of the Kokcha river drainage, lies the most important source of lapis lazuli in the recorded history of the gem trade. The Sar-i Sang mines have been worked continuously since at least the fourth millennium BCE, making them among the oldest known commercial gem mines anywhere in the world. Badakhshan also produces fine spinel and ruby, with the Kuh-i-Lal locality on the Tajik side of the border yielding the spinels marketed historically as balas rubies.

Geography and access

Badakhshan extends from the Hindu Kush in the south to the Pamir mountain ranges in the north, with elevations rising above 4,000 metres in much of the gem-producing terrain. The Sar-i Sang mines are located on a tributary of the Kokcha river at approximately 2,800 metres elevation, accessible historically by mountain trails that connected through the Panjshir valley to the trade entrepôts of Kabul and Balkh, and through the Wakhan to Kashgar and the Silk Road. The remoteness and the seasonal accessibility of the mines have shaped the trade's character throughout its long history.

Lapis lazuli and Sar-i Sang

Lapis lazuli is a metamorphic rock composed principally of lazurite, with calcite, pyrite, and minor accessory minerals. The Sar-i Sang material is the world reference standard for fine lapis: a deep ultramarine blue body with finely distributed pyrite flecks, generally free of large calcite veining, and stable in colour over centuries. Lapis from this source has been documented in Mesopotamian, Egyptian, Indus Valley, and Mediterranean archaeological contexts as early as the late fourth millennium BCE, with the Royal Cemetery at Ur and the tomb of Tutankhamun providing among the most spectacular examples.

The mines have been operated by successive local authorities — Bactrian, Sasanian, Turkic, Mongol, Timurid, and various Afghan polities — across nearly six millennia. Modern operation has been continuous through periods of considerable political instability, including the Soviet-Afghan War of the 1980s and the post-2001 conflict, with various warlords and state actors collecting revenue from the mines at different periods. Marco Polo recorded a visit to the mines in 1271. Lapis from Sar-i Sang has been the principal source for the ultramarine pigment of European medieval and Renaissance painting, where its preciousness was such that contracts often specified the weight of ultramarine to be used in particular passages.

Spinel and the balas rubies

The Kuh-i-Lal mines, on the Tajik side of the present international border but historically part of the broader Badakhshan gem region, are the source of the spinels known in medieval European trade as balas rubies. The name balas derives from Balascia, the medieval Latin form of Badakhshan. The Black Prince's Ruby in the British Imperial State Crown, the Timur Ruby in the British royal collection, and many of the great red stones of medieval and early-modern royal regalia are spinels from this source. The mineralogical distinction between spinel and ruby was not made until the late eighteenth and early nineteenth centuries; ruby in pre-1800 European usage covers both species.

The Kuh-i-Lal spinels are typically of an open, slightly purplish red, with strong fluorescence under ultraviolet exposure. The mines have been worked since at least the ninth century, with peak production during the Timurid period of the fourteenth and fifteenth centuries. Modern Tajik operation has produced periodic small-scale recoveries.

Ruby

True corundum ruby occurs at several Afghan localities, with Jegdalek in Kabul Province the principal Afghan ruby source rather than Badakhshan proper. Some material from north-east Afghanistan has nonetheless been marketed as Badakhshan ruby in the trade, and the line between Afghan and historically Badakhshan-attributed material is not always strictly drawn.

Trade context

Modern Badakhshan lapis is exported principally through Pakistan to the cutting and lapidary centres of India, China, and the West. The trade has been the subject of continuing concern about conflict-financing, particularly during periods when Taliban or other armed groups have collected revenue from the mines. Reputable dealers in lapis maintain supply-chain documentation tracing material from accessible mine sites to verified export channels, and the trade's discussion of responsible-sourcing standards for Afghan lapis has intensified since the early 2010s.

In the trade

Sar-i Sang lapis remains the world reference for fine lapis lazuli. Material with documented Afghan provenance — particularly the deep, even, pyrite-flecked ultramarine of the best Sar-i Sang grade — trades at significant premium over Chilean and Russian lapis of comparable apparent quality. For Kuh-i-Lal spinel, modern production is too sporadic to support a reliable retail trade in newly-mined material, and the historical balas-ruby designation is now principally of antiquarian and scholarly interest.

Further reading

• GIA — Lapis lazuli reference
• GIA Gems & Gemology — Afghan lapis and spinel articles