Natural or lab grown diamond?!?

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I have recently got engaged and my boyfriend got me a temporary ring because he thought it would be nice to choose my actual engagement ring together. I have been looking around and I am torn between buying a real diamond and a lab created diamond solitaire ring. To me they are both real diamonds and it doesn't matter whether they were made by the earth or a in a lab. The same example is with babies whether they are born naturally or created by IVF treatment it is still a real baby.... Anyway you can buy a 1 carat natural diamond, with a basic cut for around £1500...but you can get a perfect cut 1 carat lab created diamond ring starting around £500! What do you all think? would you be upset if your boyfriend presented you with a lab created diamond ring? do you believe it is fake even if a jeweler cannot identify its authenticity until the very last test?