Hi Precious Pearl. If you want to create a strand similar to the one your posted, you will need a full strand of pearls plus some loose assorted gemstone beads. I think the main thing to consider is the size of the drill holes in the gemstone beads which might be significantly smaller than the...
Maybe this explains why in mixed colored strands of high luster freshwater pearls, the purple ones (my favorite) always appear slightly less lustrous than the other colors.