At our facility, precious metal–bearing scraps, waste materials, and bullion of various purities generated during jewelry manufacturing are refined using aqua regia, quartering, and electrolysis methods.
Through these processes, ONSA produces gold and silver with purities ranging from 99.95% to 99.99%.
The refined metals are supplied in the desired alloy and form according to customer requirements — including granules, bars, and strips.
With our advanced laboratory infrastructure and expert team, ONSA provides reliable, accurate, and internationally compliant analytical services.
Using state-of-the-art analytical instruments, our laboratory performs gold and other noble metal assays from various materials, including solid waste, solutions, and ores.
ONSA holds the “Private Assay Office Authorization Certificate” issued by the Turkish State Mint (under the Ministry of Treasury and Finance of the Republic of Türkiye), authorizing the company to conduct precious metal and gemstone analyses and issue official appraisal reports.
With our Environmental License granted by the Ministry of Environment, Urbanization and Climate Change of the Republic of Türkiye, ONSA recovers valuable metals from industrial waste through eco-friendly systems designed with full consideration for occupational health and safety.
Our recovery services are not limited to customer satisfaction — they also contribute to environmental protection and resource efficiency, returning valuable metals to the economy safely, sustainably, and with maximum yield.
ONSA also provides specialized services in chemical salt production and recovery, including:
Through these services, ONSA supports the sustainable supply chain of the precious metals industry with its commitment to quality, innovation, and responsible production.
