- Opal var. Hyalite
- Cabinet, 10.8 x 7.3 x 6.4 cm
- Mina Etienne, San Luis Potosi, Mexico
Glassy and gemmy, globular incrustations of hyalite opal appear on the edges of a well formed vug. The spheres inside the vug are milky white chalcedony, while the hyalite spheres on the rim are colored slightly orange by iron oxides. Mesmerizing!