My house is a passive solar one with several hundred feet of attached Atrium Greenhouse - I have all the humidity I need, and more!
Oh, I totally agree, I could cover it with something. But I just spent $3600 for something that was sold to me as looking like the product I saw on Hearthstones website and glossy sales literature - in which every stove has perfectly matched top stones. If you were TRYING to duplicate a huge scratch, Hearthstone couldn't have done a better job. It stands out, and EVERY person, family and friends, the first thing they say is how did you put that huge scratch on it already - as I have already said, the moment it was unwrapped it stood out like a flashing neon light saying "scratch scratch scratch scratch"........it doesn't match the other stones, it doesn't blend in, it pure lousy craftsmanship.
I was actually HOPING some of my mellow friends might tell me, it's not that bad, but everyone has the same opinion as me - it looks like a scratch.
These stone stoves are so unique and "pretty" that very few people can look back on their stone stove experiences and remember that their stone stove had the same veins. It's like a granite counter top, each is unique and the buyer really needs to see the slab before purchasing. That's the big lesson for all parties, inspect the stove before delivery. Your dealer might even want to keep this in mind for other customers.
I didn't know any better when my heritage was bought. I had them forklift it into my truck and it was on my hearth before being unwrapped so I too could have been disappointed but wasn't. I feel bad for your situation. You're not happy and a bit stuck. You have another option: Stop payment on your CC. Tell the dealer to refund or replace the stove.
I've attached a couple of photos of my heritage after years of burning. It really does darken up and more veins of stone appear and change. I never had a crack but am also a relatively rare operator that actually monitors stove temperatures!