BUAFUL v. CONSTRUCTION PIONEERS Statutes—Construction—Minerals Act, 1962 (Act 126) —Definition of minerals—Agreement between plaintiff and defendant for defendant to dig for gravel on plaintiff's land—Price agreed upon for specific quantity dug—Defendant paying for initial quantity but not for excess gravel dug—Plaintiff claiming payment for excess—Defendants contending that what they dug was minerals—Definition of minerals in Minerals Act—Whether it included gravel—Minerals Act, 1962 (Act 126).