Quartz (var: Smoky) (“phantom” group) Sphalerite Viloco (sometimes called Araca) for

Viloco (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world

you must note that despite the sturdy matrix

greenish brown modified rhombic/hexagonal crystals of Siderite which are associated with crystals of lustrous

lustrous and GEMMY the crystals are

this is a great one to pick up for a good price as you can see a lot of well-preserved insects

Quartz (var: Smoky) (“phantom” group) Sphalerite Viloco (sometimes called Araca) forWhen it comes to mineral species, people tend to associate Bolivia with Vivianite, Cassiterite and Silver species, but there is a Gold mining operation in the north that has produced some of the finest "phantom" Quartz specimens from any locality I have seen. This specimen consists of dozens of sharp, gemmy, prismatic hexagonal crystals of Quartz (var: Smoky Quartz) that range in color from a very pale smoky color to a rich nearly "morion" black at