Don't be influenced by old myths. Determine your budget according to what you think your fiancé expects and what is financially possible for yourself. Even on a modest budget, you can put together the engagement ring of your dreams.
When deciding on your budget, there are many ways to give the ring extra WOW factor without bringing the budget up.
Several small stones are cheaper than one large stone and it still looks impressive
Place a halo around the center stone so it appears larger
Don't be afraid of fluorescent stones, did you know that only natural diamonds can fluoresce, lab grown diamonds never have this