Permanent claim record · Michigan

Michigan's state gem is Chlorastrolite — Isle Royale Greenstone — adopted 1972.

Verified
Raw value (vault-stripped) {"tags":["state-symbols","isle-royale"],"text":"Michigan's state gem is Chlorastrolite — Isle Royale Greenstone — adopted 1972.","category":"history"}
Predicatetrivia.fact
SubjectMichigan (place)
As of
StatusVerified
SourceFamous Michiganders, Pop Culture & Trivia Report — Perplexity Deep Research (2026) (trust 6.5/10)
Reference—
Document hashpending evidence-pack link
Provenance chain
Claim ID36155216-1c8d-4f63-9976-8ad46197e56f