At what point does a rock become worth over 200 times more than another one[1,2]?
Maybe one is more attractive than the other, though as Washington University’s Department of Earth and Planetary Sciences will note, ‘both visually and computationally’ the rocks look the same.
Maybe, then, the stark increase in value can be understood through unique differences in mineral composition: one rock is made mostly of plagioclase, feldspar, pyroxene, olivine, and ilmenite. The other rock is primarily made of calcite. If you still can’t tell which rock you would pay more for, though, then the price difference probably isn’t about mineral composition either.
Maybe, and perhaps more likely the case, the 200x jump in valuation has to do with the unique back story of one of the rocks: the fact that it came all the way from the moon and not your local home depot or construction site.
Value does not exist solely in the looks or spec sheets of what you create but also in the stories that your work invites people to experience and share.