Liz Claiborne Collection lined dress Size 12

Here’s a pretty black and white patterned, silk Liz Claiborne Collection dress with a side zipper. The exterior is 59% silk and 41% cotton. The black lining is 100% polyester. The dress has been dry cleaned. I noticed a small stain (see pics) after it was hanging in closet. Haven’t tried to remove. Overall, in good used condition. Only worn once.