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India signed a pact joining the coalition at a ceremony at the AI Impact Summit here.

The signing ceremony was attended by Union Minister Ashwini Vaishnaw and US envoy to India Sergio Gor, among others.

Gor said Pax Silica is a coalition of capabilities.

“Pax Silica is a declaration that the future belongs to those who build, and when free people join forces,” US Under Secretary of State for Economic Affairs Jacob Helberg said.

The move comes amid efforts by the two sides to finalise the proposed trade deal and move forward on several other initiatives to solidify bilateral ties after a spell of severe strain in relations.

Launched in December 2025

The Pax Silica initiative was launched in December last year to build a secure, resilient, and innovation-driven supply chain for critical minerals and artificial intelligence (AI).

The Pax Silica Summit was held in Washington on December 12 last year where partner nations signed the Pax Silica declaration.

The declaration lays out a shared vision of deep economic and technology cooperation across supply chains — from raw materials through semiconductors and AI infrastructure — and commitment to mutual prosperity and security.

List of member nations

The member nations of the Pax Silica included Australia, Greece, Israel, Japan, Qatar, the Republic of Korea, Singapore, the United Arab Emirates and the United Kingdom. Gor last month announced an invitation to New Delhi to join the strategic alliance. One of the key pillars of Pax Silica was to establish a durable economic order to drive AI-powered prosperity across partner nations.

“We recognise that a reliable supply chain is indispensable to our mutual economic security,” according to the Pax Silica declaration.

“We also recognise that artificial intelligence (AI) represents a transformative force for our long-term prosperity and that trustworthy systems are essential to safeguarding our mutual security and prosperity,” it said.

“We believe that economic value and growth will flow through and across all levels of the global AI supply chain, driving historic opportunity and demand for energy, critical minerals, manufacturing, technological hardware, infrastructure, and new markets not yet invented,” it said.