pearl (gem)
A pearl is a hard object made up of concentric layers of crystalline calcium carbonate, which is formed within the mantle of shelled mollusks.
Due to it's iridescent lustre, it is regarded as a gemstone and usually used in jewelry.
The following tags are aliased to this tag: pearls (learn more).
This tag implicates gem (learn more).
The following tags implicate this tag: pearls, pearl_necklace (learn more).