It is well - known that certain types of oysters can turn irritants ​ — small fragments of stone, for instance — ​ into lustrous pearls by enveloping them in layers of a secretion known as nacre.
तभी तो यीशु ने दृष्टांत में कहा कि “सौदागर ”“ अच्छे मोतियों की खोज में ” था ।