In addition to the jewellery premises operated since 1992 within Altınbaş Holding, a company owned by Altınbaş family, refining premises were constructed within 2,500 square-meter enclosed premises for the operation of gold and silver refining in 2006.

The foundation of ONSA RAFINERI (owned by Onsa Mücevherat İmalatı ve Dış Tic. A.Ş.) was first initiated in the pilot scale in 2005 upon R&D operations jointly conducted by the supports of Scientific and Technologic Research Organization of Turkey (TUBITAK) and Technological Development Foundation of Turkey (TTGV), just for the purpose of meeting the company’s own requirements. The production activities of the refinery were conducted during the period between 2006 and 2010 just for meeting the demands of the group companies. Since 2011, the premises were extended to meet the demands from the market. 

At the construction stage of the refinery, the objective has been established in conformity to establish environmental friendly technologies, in addition to providing product and service quality by conducting investigating the premises operated in Italy and Germany. To this end, the premises were structured in combination with the chemical purification and gas cleaning system to protect the environment in 2006. Furthermore, the company’s determination on preventing the environment has been verified upon registration for ISO 9001, ISO 14001 and OHSAS 18001 certifications. 

The premises mainly operate on the recovery of the scraps and wastes that contain precious metal ingredients released in the course of jewellery production. The purification is conducted by processing with so-called aqua regia and quartering method to obtain the purification on precious metals at the rate of 99.95 to 99.99%. In addition the recovery of precious metal residues out of polishes, washing waters, dry-wet surfacing waters, electrolytic solutions, used pots, slag, residues, etc. to recover the precious metals by processing in the refinery. ONSA RAFINERI is capable of refining 130 tones/year gold and 151 tones/year silver. 

The pure fold obtained is marketed as lining of with purification at the rate of 99.95% or 1-kg gold bar. The purification of the gold at the rate of 99.16% to 99.95% is possible. 

ONSA RAFINERI  is considered as featuring necessary specifications, as determined upon 3-year operations conducted by our company and entitled by Board of Directors of Istanbul Stock Exchange (BIST), adopted as of 20.03.2014, no. 2014/12 to be listed as Gold and Silver Refinery and joint to the dealings in Precious Metals and Precious Stones Market for Bar, Bullion and Granulates within Borsa Istanbul A.Ş., adopted in Precious Metal and Refineries Standards in Republic of Turkey.

ONSA RAFINERI is a leading operation in the market thanks to its laboratory infrastructure operated by the expert personnel. Thanks to ICP, XRF and Titration analysis devices equipped in the laboratories, it is possible to perform any kind of metal analysis including wastes and ores of gold and similar noble metal. ONSA RAFINERI is entitled to perform analysis on the precious ores and stones and issue relevant expertise report as per “Special Gauge House Certification” issued by General Directorate of Mint and Stamp Print House, Undersecretary of Treasury, Prime Ministry of Republic of Turkey (relevant public organization issuing authorization on performing analysis of precious metals in laboratories in Turkey). Meanwhile, the process of EN SA ISO IEC 17025:2005 Laboratory Accreditation Conformity Certificate is under progress for certifying the service quality being equivalent to international quality. 

Thanks to Environmental License of 12.05.2014, no. 219, issued by Ministry of Environmental and Urbanization, Republic of Turkey in 2014, we perform purification operations on hazardous and non-hazardous wastes for the purpose of recovering gold, silver and copper by environmental friendly systems.