Why is "The Girl with the Pearl Earring" a mystery, like the Mona Lisa?

“Girl with a Pearl Earring” appears to be from a simple peasant family. Her look is beautiful. Like the Mona Lisa, she is looking at someone, but this look has a seductive look that is not in the Mona Lisa.

But the main thing that attracts the attention of the audience is, of course, the large earring. Many researchers focus on the unlikely shape and strange shine of the “pearl.” It is possible that this is, for example, Italian glass with a silver decoration or coating.

“The Girl with the Pearl Earring” is one of Vermeer’s most mysterious and famous paintings. Very often this painting is called the “Northern Mona Lisa.” Johannes Vermeer is considered a master of light, and in this work he showed his talent, perfectly depicting the soft glow of the girl’s skin and the highlights on her lips.