Paravauxite with Sigloite (rare material)

Item Description

From the type locality for both species, here we have a nice reference specimen of Paravauxite with Sigloite. It should be noted that Sigloite forms as the result of the alteration of Paravauxite, which is why they're seen together all the time. They are highly prized for their rarity and beauty. This piece features incredibly rare, good quality, sharp, lustrous, pale greenish colored crystals of Paravauxite with light tan colored crystals of Sigloite on iron-stained Wavellite on matrix. The largest crystal measures 6 mm long. Mark Chance Bandy described Paravauxite crystals in his book "Mineralogy of Llallagua, Bolivia". He states that "Paravauxite is the most abundant of all the "Vauxites" from this mine," and with that said, you almost never see specimens, especially pieces that are larger than thumbnails available on the market. This piece is a nice overall example of the prismatic, sheaf-like parallel growths that Mr. Bandy described.