The idea of making a jewelry business is inspired by the necklace that Winter received from Marcellus last night.
Not too long ago, she was not very fond of such luxuries. Even when she became the head of a multi-million company before, she didn't develop any interest in them. She considered them as mere symbols of wealth and status, and even though they could also be used as emergency funds, she regarded them as nothing but a heavy burden that she had to carry around.
It did make Winter beautiful, but it didn't make her happy.
That's until Marcellus started giving her different kinds of accessories as presents.