Calcite pearl, formed in darkness, not by an oyster, but around a grain of sand.
Cave Pearl is a pale grey, close to white.
It can be described as pale, delicate, faded and almost grey.
Set in black, because black reads best on it.
A cave pearl is a small, usually spherical, speleothem found in limestone caves. Cave pearls are formed by a concretion of calcium salts that form concentric layers around a nucleus. Exposure to moving water polishes the surface of cave pearls, making them glossy; if exposed to the air, cave pearls can degrade and appear rough. Unlike pearls found within mollusks, they have no monetary value at all.
Read on WikipediaCaves and caverns are natural voids under the surface of the Earth and have also been observed in other rocky worlds. Caves often form by the weathering of rock and can extend deep underground. Exogene caves are smaller openings that extend a relatively short distance underground. Caves which extend farther underground than the opening is wide are called endogene caves.
Read on WikipediaA pearl is a hard, shiny object produced within the soft tissue of a living shelled mollusk. Like the shell of a mollusk, a pearl is composed of calcium carbonate in a crystalline form, which is deposited in concentric layers. More commercially valuable pearls are perfectly round and smooth, but many other shapes, known as baroque pearls, can occur. The highest quality of natural pearls have been highly valued as gemstones and objects of beauty for many centuries. In literature, pearls have become a metaphor for something rare, fine, admirable, and valuable.
Read on WikipediaThe color pearl is a pale tint of off-white. It is a representation of the average color of a pearl.
Read on WikipediaNoun