Metal Traces: Omani Copper and Harappan Artefacts Connection

This question asks us to identify a specific metal trace found in both Omani copper and Harappan artefacts. The presence of the same trace elements in materials from different locations can suggest either a common geological origin or extensive trade networks connecting these regions.

Analyzing the Metal Options

Let's look at the options provided and consider their relevance in the context of Omani copper and Harappan artefacts:

• Tin: While tin was crucial for making bronze, a key alloy used by the Harappans, its specific connection as a shared *trace* element linking Omani copper directly to Harappan artefacts isn't the primary finding in this context.
• Iron: Iron use came later than the main Harappan period and Omani copper smelting. While iron objects exist, it's not the specific trace metal identified as a link in this particular archaeological context.
• Zinc: Zinc was known and used later, particularly in purified forms, but it's not the trace element highlighted as the common factor between Omani copper and Harappan artefacts.
• Nickel: Archaeological and chemical analyses have shown that Nickel is present as a significant trace element in copper artefacts found in both Oman and the Indus Valley (Harappan sites). This similarity points towards a potential common source for the copper or established trade routes facilitating the movement of materials.

Nickel: The Connecting Trace Element

The discovery of Nickel traces in both Omani copper and artefacts from Harappan civilization sites is a key piece of evidence. This finding suggests a connection, potentially indicating that:

• The copper ore used by Harappans might have originated from or passed through regions like Oman.
• There were established ancient trade routes linking the copper sources of Oman with the Harappan civilization.

Therefore, Nickel is the metal trace identified as suggesting a common origin or link between Omani copper and Harappan artefacts.