Opinion of the Court by
Affirming.
On Marcli 27, 1897, appellant by deed conveyed to appellee Sallie L. Todd, one-half interest in a farm owned by him, in exchange for one-half’ interest in an onyx mine on her farm, which she and her husband at the same time conveyed to him. It turned out afterwards that the stone was not onyx, but *427limestone, and appellant sought in this action to cancel the deed made by him to her for one-half the farm, on the ground that it was obtained by fraud or mistake, and without consideration. There is no evidence of fraud. It is perfectly clear that neither appellant nor appellee knew anything about mineralogy, and this was well known to appellant when the trade was made. He knew also that, if the stone was tested and found to be what it was supposed to be, he could not get one-half interest in the mine for one-half interest in the farm, which was worth about $700. He could have waited, and had the stone tested. This was discussed. But he preferred to take the other course, and risk his judgment, declaring that his eyes did not deceive him, on the distinct understanding that, however valuable the mine should turn out to be, the half of it should be his, and, if it should prove valueless, it would be his loss. Appellee did not deceive him. She took the risk of the mine turning out to be very valuable. She had no better means of knowledge than he. Both thought the discovery valuable, but both knew that it was untried and uncertain. Under such circumstances, the chancellor cannot undo for appellant •the contract he deliberately made.
While the rule is that equity will relieve against a contract made by mutual mistake, where the consideration has failed, this doctrine has no application to what is called a “chancing” bargain, like that in this case. The rule is thus stated in 2 Pom. Eq. Jur. section 855: “Where parties have knowingly entered into a speculative contract or transaction — one in which they intentionally speculated as to the result, and there is in either case an absence of bad *428faith, violation of confidence, misrepresentation, concealment, and- other inequitable conduct mentioned in a former paragraph — if the facts upon which such agreement- or transaction was founded, or the event of the agreement itself, turn out different from what was expected or anticipated, this error, miscalculation, or disappointment, although relating to matters of fact and not of law, is not such a mistake, within the meaning of the equitable doctrine, as entitles the disappointed party to any relief, either by way of cancelling the contract and rescinding the transaction, or of defense to a suit brought for its enforcement.” There has been no failure of consideration here. Appellant has all that he bought. The loss that has fallen upon him is the result of a chance he took, which was fully discussed and considered by him before the contract was made.
Judgment affirmed.