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The colouring that occurs on the inside of shells from the ocean is a result of a substance called nacre. Some types of molluscs secrete nacre as a defence mechanism (this is how pearls are formed, for example). Nacre is a combination of calcium carbonate (CaCO3) and an organic glue-like substance - possibly conchiolin - that holds it together.
The reason nacre has such iridescent colours is that the thickness of the calcium carbonate layer is similar to the wavelength of light. This means that light reflected from the outer surface interferes with light reflected from the inner surface, and this interference produces different colours depending on the angle at which they are viewed.
What else can I help you with?
What are seashells colors?
Seashell colors: pink orange brown your big fat buts
How many colours do seashells come in?
They have to many colors, but the most comun are the white and grey.
What is the possessive form of seashells?
The possessive form of "seashells" is "seashells'."
How do you get the seashells to open with magic in kingdom hearts 1?
The seashells that use magic are different colors. For example, the orange shell needs to be hit with fire. It's easiest if you target the shell first then cast the spell that it needs.
How many colors of sand are there on beaches?
There are many types of beaches. A pink sand beach is made of crushed bit of seashells.
What is the collective noun for seashells?
That would be seashells.
What is the correct spelling of seashells?
The correct spelling is seashells. An example sentence would be "there are plenty of seashells on the beach".
Do whales grow with seashells?
No whales do not grow with seashells
Do you have any facts about seashells?
yes seashells are common on beaches
What shapes are seashells?
Seashells come in all sorts of shapes.
What is good morning in seashells language?
There is no such thing as seashells language.
How seashells made?
seashells are made by rocks rubbing together
