Price is for 1 genuine, natural 40x30mm teardrop semiprecious stone focal pendant bead.randomly selected   We often add a sterling silver bail,or large thick sterling silver jump ring to hang on a chain or leather necklace for a great look & instant gift.  There is a hole at the top of the bead running front to back.   The photo is enlarged to show detail.

There are plenty of FREE on-line measurement converters should you require.