Gorgeous Willowby by Watters Marseille Dress with a beautiful sheer/illusion sweetheart neckline and a very flattering silhouette. The lining is a light almond color and the illusion is "sheer nude." I purchased this dress brand new for $1902.00 in May of 2017. I loved this dress but a week later I found one that I love even more so no alterations have been done on the dress and the tags are still on!
EDIT: I've included photos of the dress next to a "pure white" dress so you can see what the "oyster" and "almond" colors look like.