Kays 268:10 :ܐܠܝܩܛܪܘ݁ܢ ܐܝ݂ܬܘܗܝ ܓܘ݂ܫܡܐ ܡܪܟܒܐ܂ ܒܙܒܢ ܡ݁ܢ ܕܗܒܐ ܘܣܐܡܐ܃ ܘܒܕܘ݂ܟ ܕܘ݂ܟ ܡ݂ܢ ܓܘ݂ܫ̈ܡܐ ܐܚܪ̈ܢܐ‏ : electrum is a compound substance, sometimes from gold and silver and in some places from other substances
See the entire entry for ˀāleqṭrōn n.m. electrum