Permanent claim record · Michigan
Michigan's state gem is Chlorastrolite — Isle Royale Greenstone — adopted 1972.
| Predicate | trivia.fact |
|---|---|
| Subject | Michigan (place) |
| As of | |
| Status | Verified |
| Source | Famous Michiganders, Pop Culture & Trivia Report — Perplexity Deep Research (2026) (trust 6.5/10) |
| Reference | — |
| Document hash | pending evidence-pack link |
| Provenance chain | |
| Claim ID | 36155216-1c8d-4f63-9976-8ad46197e56f |