Once the stone is completely dry, it gets a thorough "inspection," during which I decide whether or not it seems "worthy." If the answer is "yes," it is signed and numbered on the bottom, and then protected with a durable coat of clear finish. After all, these stones were meant to be touched and handled, and we don't want the pattern to wear off.
In terms of durability, the clear coat is equivalent to a protective layer of marine-grade varnish.
My wife then creates and hand sews an individual silk or satin lined drawstring pouch for each stone. She has many different types of luxurious fabrics and decorations... and each bag is made specifically to "fit" the stone that will go in it. The bags not only offer a place to keep your Alchemy Stone, they are very beautiful, as well. She gets many requests to custom make these bags for other personal objects, but these treasure bags are only available with Alchemy Stones.