Code of Federal Regulations · Section
§ 301.6 — Stone For Ornamentation
25 C.F.R. § 301.6
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In addition to turquoise, the use of other local stone is permitted. Turquoise, if used, must be genuine stone, uncolored by any artificial means.
Authorizing Statute
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Rules and regulations; submission to Secretary of the Interior25 U.S.C. § 305b