Specimen Number29-8-011Alternate NumberKH-203CommentsPorphyritic phonolite with disseminated pyrite, strongly silicified.In Teaching CollectionNoMineral(s)quartzfeldsparpyriteRock NameAu oreDistrictCripple CreekMineCressonExternal LinkMindatDeposit TypeDiatremeThin SectionBox 8, slot 49Geo-Coords[1] Donated ByFrom the research collection of Dr. Paul Spry