Price listed is for each half-ounce of stones. This is a mixed lot of natural stones, ranging in size from about 18mm up to about 24mm. Most of these stones look like Mother-of-Pearl, but some look like abalone or other shell. There will be lots of variation in color and stone thickness. Each piece is unique! The sample 1/2 ounce had 9 pieces. We cannot guarantee the number of pieces you will receive, only the weight. Some may have adhesive residue on them. This residue can be removed with vinegar.