If a Diamond is Love, Daisy is but an Emerald

"She's got an indiscreet voice," I remarked.  "It's full of---" I hesitated. 
"Her voice is full of money," he said suddenly. 
That was it. I'd never understood before.  It was full of money--that was the inexhaustible charm that rose and fell in it, the jingle of it, the cymbal's song of it...High in a white palace the king's daughter, the golden girl....

The Great Gatsby--F. Scott Fitzgerald (p. 120 in my copy)

After reading this passage it occurred to me, perhaps, for Jay Gatsby Daisy is not purely a case of the one true-love that got away. Even as a boy, little Jimmy Gatz had set goals upon goals to bring him closer to his incurable dream.  Daisy is an extension of this dream; you could even go as far as to say, she's the embodiment of everything he desires. The fact he hears the sound of money in her voice speaks to this idea.  A few other pieces of text contributed to my arrival at this assumption. During one of Nick and Gatsby's more sentimental talks, shortly before his death, Gatsby recounts first meeting Daisy. Here the narrator, Nick, injects, "It excited him, too, that many men had already loved Daisy--it increased her value in his eyes." Gatsby wants what other people have: more accurately put, he wants what is covetable.  You could overlap that observation with an earlier conversation where Nick concludes, "He talked a lot about the past, and I gathered that he wanted to recover something, some idea of himself perhaps, that had gone into loving Daisy"  And another probing remark, conveying the grandeur scope of Gatsby's fantasy, comes in the midst of their (Jay and Daisy's) reunion: "There must have been moments that afternoon when Daisy tumbled short of his dreams--not through her own fault, but because of the colossal vitality of his illusion." I think Gatsby honestly believes he loves Daisy, only his reasons for wanting her entail more than his character outwardly acknowledges--even to himself. If he has Daisy he has cemented the dream, so to speak.  

An equally notable detail is how Fizgerald employs the color green to illuminate the beckoning light perched on Daisy's dock. (The shade of Green is typically associated with jealousy and envy)  Remember when Nick first catches his neighbor outside. Initially Nick intends to introduce himself, but desists noticing Gatsby's evident preoccupation with something off ahead.  He was gazing enviously toward Tom Buchanan's home, I imagine, because he wished for everything Tom had: Daisy, money (though he has money, a stigma is attached to its acquisition), and stature (a secure position in this materialistic world).

Considering last class's discussion and a section from Foster's book, I would view Jay Gatsby as an obvious outsider to the (materialistic world) community: a community which acts as a succubus consuming the best of him then callously leaves him for dead.