Sea glass - Anita Shreve (Fortune's Rocks #2)

'In the wet sand by her foot, a bit of colour catches her eye.
The glass is green, pale and cloudy, the colour of lime juice that has been squeezed into a glass. She brushes the sand off and presses the sea glass into her palm, keeping it for luck.'

New Hampshire, 1929—when Sexton Beecher proposes to Honora Willard, she lays aside his flaws as one might overlook a small stain in a beautifully embroidered tablecloth.
But as the couple begin their new life in the house at Fortune's Rocks, their love is about to be tested to the limit. For the Wall Street Crash has as little time for dreams as it does the mill workers at nearby Ely Falls, who are readying for strike whatever the consequences...