If you know what you're looking for you can usually tell if you have some forms of interesting figuring before you even cut down the tree. I'm no expert but I've been shown by those that look for such characteristics (a sawyer and a timber yard owner) how, by peeling off a section of bark, it reveals the growth patterns underneath. I recall exactly this when a timber yard owner peeled back the bark of a sycamore sawlog to show me what he meant, and he exclaimed with some excitement about having found wavy grain that would need to be sawn just right to maximise the figuring in sawn boards, which would also lead to charging a bit more per cube.
Anyway, that conversation, and a couple more with others in the felling, conversion and seasoning game illustrated the ability that those in such professions have to read a tree's trunk. So, maybe, it's more than possible you can take a scion from a live tree and graft it as MusicMan suggested. I suppose the question then is how likely is the new growth to replicate the characteristics of the original tree? I'm guessing that's something for the botanists and geneticists to discuss - are identical twins exactly the same in every way even though their genetic code is the same? Slainte.