Bloodstone from Oregon, USA
USA | |
| MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages. |
| The Mineralogist, v.4,no.7,p.18. |
| Dorothy M. Schlegal (1957) Gem Minerals of the United States : USGS Bulletin 1042-G |