# porphyritic rock

> igneous rock containing crystals of contrasting size (large and small crystals)

**Wikidata**: [Q3774256](https://www.wikidata.org/wiki/Q3774256)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Porphyritic)  
**Source**: https://4ort.xyz/entity/porphyritic-rock


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)