# John W. Gruner

> American mineralogist

**Wikidata**: [Q15713740](https://www.wikidata.org/wiki/Q15713740)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_W._Gruner)  
**Source**: https://4ort.xyz/entity/john-w-gruner


## References

1. Integrated Authority File
2. Mineralogical Society of America
3. Virtual International Authority File