It was the perfect gift really, and it showed that she paid attention to him. To the things he said. Asterion loved his little collections of things. Shiny rocks and paper-thin leaves, and coins from distant lands, dropped from busy hands. His new apartment had built-in bookshelves but Asterion wasn't much of a reader, so his little collection graced those shelves in pride of place. And the guartz was going to go right in the middle, so every time he looked at it, he would think of her.
"It's so perfect," he said, getting emotional at the idea of it. "I've never been given a gift. Thank you, Erato. You are a good friend."