Paravauxite with SigloiteThese crystals are one of the most beautiful phosphates in the world. They are highly prized for their rarity and beauty. This remarkably attractive specimen features beautiful lustrous, light green Paravauxite crystals and tan colored Sigloite crystals associated with micro crystallized iron stained Wavellite needles on matrix. Sigloite forms as an alteration of Paravauxite. This specimen is from the type locality for both species! Mark Chance Bandy

but it is contacted on the back / base of the piece

Here is a great old locality specimen of Vivianite from the Siglo XX mine in Bolivia

you almost never see specimens available on the market

The piece was rather difficult to photograph

but also for sheer value on the market

and specimen value is second

Specimen# CO712B179

A beautiful “toenail” sized display specimen from the world-famous Eagle Mine (more properly the New Jersey Zinc Eagle Mine)

but I can't say conclusively

and as you can see from the photos

it’s a beautiful piece

defined dodecahedral and octahedral crystals of Copper can be seen from all sides