His incoming all contributed to his family at that time, he has no money for everything. but we have to marry then, so i lent him some money to buy the Ring and arrange the wedding. It was so sweet, although not big. 0.38 . He proposed in a beautifull hotel garden, really sweet.
Now His finance is more than enough for everything. So girls shouldnt focus on the money in a short time, but value the meaning of love.
my suggestions, give some hints to you GF, or ask her good friends for the idea. A general rule is The diamonds price shouldnt be less than 1 month of your salary, but if your salary is more than 8k, consider carefully.