4.8. Natural Resources Acquisitions.Property acquisitions involving natural resources—such as minerals, timber, or water rights—are subject to the same valuation standards as any other type of property acquisition.961 While such acquisitions may present particularly complex valuation problems for purposes of just compensation, “whatever the difficulties may be in making such appraisals with complete accuracy, it does not defeat the existence of a ‘market value’ . . . and it does not suffice as a reason to depart from the ordinary requirements that the law imposes on such transactions.” 962 Moreover, “the degree of speculation can and should be minimized.”963 Specialized expertise is typically required, either by the appraiser or through appropriate subsidiary experts, subject to the requirements discussed in Sections 1.11 and 4.12.964 Several frequently encountered (and often confused) valuation issues are discussed below.