We are Among

TURKEY'S

Top 500 Companies
DISCOVER
The Signature on Gold
Gold is bought with confidence — and that confidence is ONSA.
The Signature on Gold

ONSA

ONSA Refinery strives to become a global leader by accurately identifying customer needs in expanding markets and continuously enhancing its processes, products, and service quality through the active participation of its employees.

The Right Address
for the Right Investment

Delivering High-Quality Solutions for High Expectations
Only

Quality
Craftsmanship

Gold or silver... At first glance, they may look alike. But only a trained eye recognizes that craftsmanship is what makes them unique. At ONSA, every detail is approached with precision and excellence.

ONSA
The Leading Refinery of Turkey

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Our Sustainability Approach

True to its brand vision, ONSA adopts a holistic approach to sustainability — not only in terms of the environment but also through responsible waste and water management, and by adhering to international certification standards. Since its foundation, ONSA has acted with transparency and a strong commitment to social values, continuously reinforcing this vision through ongoing investments.
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Cutting-edge technology in gold and silver production
— an ONSA hallmark.

In every process,
we stand by you with trust, quality,
and a commitment to sustainability.