...the Jacutinga is foliated, and forms -under pressure spheroidal oblong crystals never found perfect. It shows great differences of consistency ; some of...not harder than fuller's earth ; it is easily wetted * I have reason to believe that there are Ferreira says the Jacu-tinga (white) is "do formations of...

...the Jacutinga is foliated, and forms under pressure spheroidal oblong crystals never found perfect. It shows great differences of consistency ; some of it is hard and compact as hffimatite, and this must be stamped like quartz. In parts it feels soapy and greasy, not harder than...

...iron-sehist, and friable quartz mixed with specular iron, oxide of manganese, J and fragments of tale The floor rock at Cocaes is fine micaceous peroxide...iron-schist. § The gold of the jacutinga is free. Casteluau || says, that at Congo Soco it is always confined to a little vein which winds about in the...

...found perfect. It shows great differences of consistency ; some of it is hard and compact as hematite, and this must be stamped like quartz. In parts it...harder than Fuller's earth ; it is easily wetted and pulverised, but it is hard to dry. Its gold is readily separated by washing, and it is purified with...

...the jacutinga is foliated, and forms under pressure spheroidal oblong crystals never found perfect. It shows great differences of consistency ; some of it is hard and compact as hematite, and this must be stamped like quartz. In parts it feels soapy and greasy, not harder than...