Zanzibar and Indian Ocean trade in the first millennium CE: the glass bead evidence

Recent archaeological excavations at the seventh-to tenth-century CE sites of Unguja Ukuu and Fukuchani on Zanzibar Island have produced large numbers of glass beads that shed new light on the island's early interactions with the wider Indian Ocean world. A selected sample of the beads recovered was analyzed by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to determine the origins of the glass used to make the beads and potential trade relationships are considered. The data show that two major glass types can be identified: mineral-soda glass, m-Na-Al, produced in Sri Lanka (and possibly South India) and plant ash soda glass. The latter comprises three subtypes: two with low alumina concentrations and different quantities of lime (here designated v-Na-Ca subtypes A and B) and one with high alumina (designated v-Na-Al). The v-Na-Ca subtype A beads are chemically similar to Sasanian type 1 glass as well as Zhizo beads found in southern Africa, while v-Na-Ca subtype B compares reasonably well with glasses from Syria and the Levant. While the mineral-soda beads were made in South Asia, it appears likely that at least some of the plant ash beads were made in South or Southeast Asia from imported raw and/or scrap Middle Eastern glass. In contrast, during this period, all beads imported into southern Africa were made of Middle Eastern glass from east of the Euphrates (v-Na-Ca subtype A) and appear to have arrived on ships from Oman and the Persian Gulf. These data suggest that the two sections of the African coast were engaged in different Indian Ocean trade circuits

Why Coins Turned Round the World Over? A Critical Analysis of the Origins and Transmission of Ancient Metallic Money

The inspiration behind the pre-modern bronze round coinage standardised across China by the First Emperor of Qin in the 3rd century BC have remained fairly obscure and are still a contentious issue. We demonstrate in this article that the various theories arguing for an exclusively endogenous impetus behind the spread and development of Chinese round coinage vouched for by many scholars in either East Asia or the West all carry inherent contradictions. In contrast, circumstantial and archaeological evidence in support of partly exogenous origins are mounting. Evidence from the Middle East points to the early invention and wide circulation of round coinage in Lydia, Greece and the Achaemenid Empire. The expansion of the Persians into India in the 6th century BC and the later incursions by Alexander and the Greco-Bactrians in the fourth and third centuries BC all facilitated and may have decisively contributed to India's adoption of round coinage. Similarly, the flow of ideas, artistic motifs and metallurgic knowhow from West Asia to China via Central Asia had occurred much earlier than the 3rd century BC. Active adoption of foreign (Central Eurasian steppe) customs in the fourth century BC is recorded in Chinese pre-imperial records and confirmed by recent archaeological findings across Eurasia. Ongoing archaeological work in China's western provinces could further highlight this ancient phase of globalization that, quite literally, still shapes our most fundamental grasp of money