Opal (var: Opal-AN) / (var: Hyalite Opal) (“Blood Vessel Opal”) Mogok Franckeite is a relatively rare

Franckeite is a relatively rare iron

I still photographed the crystals under the microscope to better illustrate their quality

Specimen# CO712B89

and the only point of contact is on the back/bottom where it detached from the pocket wall

The Julia Fisk Mine is one of the more notable specimen producing mines in the Leadville District

Opal (var: Opal-AN) / (var: Hyalite Opal) (“Blood Vessel Opal”) Mogok Franckeite is a relatively rareA rarely seen matrix specimen of Hyalite from San Luis Potosi, Mexico featuring bead like gemmy, colorless spheres which are included with a small amount of orange iron oxide to give it the blood vessel like inclusions, hence the nickname Blood Vessel Opal. Interestingly enough, the piece has a dual texture effect where some of the globules are perfectly smooth, while others have an alligator skin appearance on the surface. One can spend a great deal