This is Oolite or Fish Egg.  It will work for cabochons, carving, specimens and great for decoration.  It also makes nice, tumbled stones. UV fluorescent (shot with uvBeast 365nm(nanometer) Black Light UV flashlight).

For size reference a fist size piece will weigh approximately 1 pound.

In any 5 pound or larger order, we will select an assortment of small to large fist size pieces for you.