This block is an example of the one you will receive

There will be chips on the edges

The photos are taken outside. 

The fourth photo I wanted to show opalescence with it backlit by the sun.

These blocks measure approx  5 3/8" x 3 5/8" x 1 5/8"

They weigh approx 3 pounds each

This glass was made to resemble real opal.  

It contains a high amount of phosphorus to make it look like Milk Opal.

It has a luminous moon-like glow to it.

This material is easily knappable and behaves like glass. 

THE LAST PHOTOS SHOWS EXAMPLES OF HOW THIS MATERIAL KNAPS AND IS NOT INCLUDED IN SALE

We have many of these blocks available.

We have been selling rough rock and slabs in Quartzsite, Arizona for over 20 years.  

Thanks for looking