From left to right in picture:Turritella agate, fossilized small shells from 50 million years ago, 2 2/2" x 1 5/8" with hole drilled for a pendant. Ammonite pendant 1 7/8" x 1 1/2", extinct marine mollusks from the Jerasic period. The string indicates hole placement. Dyed bamboo coral with a vertical hole for stringing. This coral is naturally grey. It is dyed to resemble red coral which is now hard to find. All bamboo coral has to be resin coated as it is extremely porous. It is 2 2/2" x 3/8"