Islamic banking assets in Oman climb 10.5% to surpass $26bn. RIYADH: Assets held by Islamic banks and Islamic banking windows in Oman rose 10.5 percent year on year to 10.1 billion Omani rials ($26.2 billion) in July, according to recent data. Figures released by the Central Bank of Oman showed that Islamic banking entities provided 8 billion rials in financing by the end of July, up 10.9 percent from the same month a year earlier.