Quote:
Originally Posted by Anthony
Note that, because failed results don't actually add to the enchantment on the stone, the correct ratio is 210/206, not 216/212, meaning the actual multiplier for a 50 point stone is 2.6157 and the final stone cost is $71,625. Except that you also want to know about quirks, which we can approximate as a binomial distribution where n is the size and p is 6/212 (it's not actually a true binomial); for a 50 point stone, of the surviving stones, roughly 23% will be unquirked, the rest will mostly have 13 quirks.

Or if you have trouble just with exponential notation, you can ignore this complexity and just use the formula in
Magic. It's close enough.