Specimen Number29-8-010Alternate NumberKH-177CommentsSilicified porphyritic phonolite with disseminated pyrite.In Teaching CollectionNoMineral(s)quartzpyritefeldsparRock Namemineralized phonoliteDistrictCripple CreekMineCressonExternal LinkMindatDeposit TypeDiatremeThin SectionBox 8, slot 48Geo-Coords[1] Donated ByFrom the research collection of Dr. Paul Spry