Interesting Hyalite Opal from Zacatecas, Mexico aquamarine The size and quality is

The size and quality is the best that I have seen available

due to the hydrophane nature of this opal

This lovely cabinet sized calcite specimen has a beautiful coloration with the most saturation towards the tips of the calcite crystals

The opposite side

Interesting Hyalite Opal from Zacatecas, Mexico aquamarine The size and quality isThis hyalite opal specimen not only will glow under an artificial UV lighting source, this particular source of hyalite opal will actually fluoresce in daylight, too! That is what makes this source(Zacatecas, Mexico) so unique. It looks best in diffused daylight, right outside of direct sunlight and it will have subtle green glow, while in indoor home lighting, much of this opal is almost colorless. The intensity of daylight fluorescence will vary