Polyhedroid Agate.~

Polyhedroid Agates are also from the great agate producing country of Brazil, but were found in only one location, Paraiba, Brazil.  These unique shaped agates are geometric patterns rather than the random round look of most agates. These wonderful specimens were only available for a very short time in the 1970's and are extremely difficult to find today. Seems the holders are holding fast. These were very popular as jewelry items when the agates heyday was in full swing being all you needed to do is keep its natural shape. I can imagine all the triangle and box shaped free form pendants hanging on black leather rope. The formation of these agates is still a topic of discussion among geologists. Most agree that the agates formed in the interstices between tabular crystal formations of calcite in the somewhat randomly shaped angled spaces between calcite crystals. Well all that was needed now was for enough time to go by for the calcite to degrade back to the earth leaving the much harder agates behind. Just like when obsidian degrades and leaves all its bubbles behind in the form of agates. The agate nodules themselves are sometimes hollow and the best grades feature sharp, colorful fortification bands that follow the shapes of the agates. Black, blue, gray & white seem to be common colors. Wow, this piece has a stunning blue botryoidal interior that is a rare color indeed. And look at the fortification pattern and color. This has a wow factor of 10 and you may think by the looks of some of the pictures, the blue has been added some way. I mean, look at the spot where there's no color and it's clear agate. Looks suspicious doesn't it. Look where you see the blue deep into the agate on the cut face. It's real and an awesome find! -DRY/WET pic.-(10 oz.) small cut off end goes with order   no fractures...