An example of foreshadowing in the story the necklace?

The only hint that the diamonds are fake can be detected in Mme. Forestier's reply to Mme. Loisel when she asks:

"Will you lend me this, only this?"

It would appear to the reader that she is asking to borrow the most expensive piece of jewelry in the whole collection. A necklace like that would cost at least $150,000 in present-day American dollars, possibly much more. Yet Mme. Forestier's reply might make an especially keen reader wonder. She replies:

"Why, yes, certainly."