Cassiterite (“drill bit” twins)Huanuni is actually the RICHEST Cassiterite deposit in the world, and although its best known for its phosphate species, occasionally some fine quality Cassiterite specimens are found. This attractive, classic, sharp, lustrous, jet black group of drill bit twinned crystals is certainly fine quality for the species and the locality. Good quality all the way around, and if youre a collector of Cassiterites or Bolivian minerals, this would make a great

Willard Wulff

Ferberite was sometimes previously referred to as "Wolframite"

along with parasitic wasps (Hymenoptera) plus one large

it still looks better in person

it’s a very fine Augelite not only from Bolivia

and the size of the crystals places it in the upper ranks of all specimens found

County Museum

Specimen # BOL711B139

Specimen # BOL711B222

Specimen # AMAZWH111905

The Galena groups have a selective deposition of bright

It is one of the better crystals of this rare material that I have handled and would make a great addition to a thumbnail suite