Hey! The logic of using a credit card seems to be sound, and it's super sweet that you saved so much for a ring. No judgments here on whether you go big rock or not, but I sold fine jewelry for quite a while and I've got to throw in my two cents. There's nothing wrong with your lady wanting a classic engagement ring. BUT, jewelry (yes, even diamonds) has a terrible resale value. So, consider this. You could spend 6k on a new ring, OR you could spend 3k on an estate ring that is equal (in terms of ccc- that's cut, color, clarity). So then you could either bank that leftover 3k, or you could propose, and use that 3k toward your wedding/honeymoon! Many women, myself included, actually prefer vintage jewelry (art deco era has the most beautiful settings)- but if she wants that current solitaire tiffany look you can still definitely find that used for much less than 6k. Hope this helps, good luck!