# gritstone

> hard, coarse-grained, siliceous sandstone

**Wikidata**: [Q1048392](https://www.wikidata.org/wiki/Q1048392)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Gritstone)  
**Source**: https://4ort.xyz/entity/gritstone


## References

1. Freebase Data Dumps. 2013
2. BabelNet