The Hedley Kow

Looking inside she discovers it is full of gold pieces, and decides to drag it home in her shawl.

She observes this will be easier to sell, and that the penny pieces it will bring would be safer than either gold or silver.

When she reaches her home, the rock transforms again, revealing itself to be the Hedley Kow, a mischievous shapeshifting creature.

She proclaims that it was quite a thing to have seen the Hedley Kow for herself, and goes inside to think about her good luck.

The German fairy tale "Hans in Luck" has a similar sequence in which the character believes that every change is for the better.