A precious material analyzer may determine one or more characteristics of an unidentified precious material. A vibration injector may cause the unidentified precious material to vibrate with a vibration signature that is dependent on the one or more characteristics of the unidentified precious material. A vibration detector may detect and extract a vibration signature from the vibration of the unidentified precious material caused by the vibration injector. A vibration signature comparator may: compare the detected vibration signature of the unidentified precious material with vibration signatures of multiple identified precious materials having one or more identified characteristics; and flag one or more of the identified precious materials that have vibration signatures that are similar to the vibration signature of the unidentified precious material.