2.17 State gem. Sec. 1. Chlorastrolite, commonly known as greenstone, is adopted as the official gem of this state. History: 1972, Act 56, Eff. Mar. 30, 1973
Michigan Legal Code
2.17 State gem. Sec. 1. Chlorastrolite, commonly known as greenstone, is adopted as the official gem of this state. History: 1972, Act 56, Eff. Mar. 30, 1973