Are All Pearls Round and How? | Ocean Blog
How do pearls form?
Pearls form when a small irritant, such as a grain of sand, finds its way into the enclosure of an oyster shell. The oyster, irritated by this foreign object, begins coating it in a material called nacre, which it produces. Nacre is composed primarily of aragonite, a carbonate crystal, which is bonded with weaker materials such as proteins and chitin. The oyster gradually coats the foreign irritant in layers of nacre, forming a pearl in the process.
Formation of the pearl
Every pearl farmer's aim is to grow perfectly round pearls, but this does not always happen. Mollusks that produce pearls are usually nucleated with spherical bead nuclei. This round nucleus is inserted into the host mollusk, which then wraps it in a pearl sac. The pearl sac will have the same shape as the bead nuclei (round), but differences and variations are common inside the mollusk. The forming pearl starts to take shape as the mollusk secretes nacre to cover the bead nucleus within. The mollusk's muscles gently roll the nucleus around while the pearl inside slowly develops.
Any break in the layering process creates differences in the nacre, which are then accumulated or stacked on top of each other with successive layers of nacre. Irritants, abrupt changes in temperature, atmosphere, or even parasite infection will all of be factors that will cause a pearl's formation to be disturbed.
Possible pearl shapes:
- Round: Round pearls are perfectly spherical - the shape most people think of when they think of a pearl. Due to their relative rarity and "classic" nature, they are highly desirable. Round pearls fall into the spherical category.
- Near-round: These pearls are not perfectly round. Instead, they are slightly flattened or elongated rather than being a perfect sphere. Nonetheless, they are so nearly perfect that they, too, are classified as spherical.
- Semi-round: These pearls are semi-round, similar to near round.
- Oval: These pearls are shaped like an oval - narrower at the ends than they are in the centre. Ovals are categorised as a symmetrical shape.
- Button: Button pearls are flattened to some degree, making them resemble a button or perhaps a disk rather than a perfect sphere. These pearls are often used in earrings where the flattened side can be attached to the setting. Buttons are also categorised as symmetrical.
- Drop: Drop shaped pearls are pear or teardrop-shaped. The drop can either be "long" or "short" depending on its proportions. These pearls make attractive earrings or pendants. This is also a symmetrical shape.
- Baroque: This is a pearl which is both non-symmetrical and irregular in shape. The baroque pearl can be purely abstract in its shape or it can resemble a cross, stick or some other shape. Baroque pearls fall into the baroque category.
- Semi-Baroque: These pearls are slightly irregular in their shape. For example, a pearl which might otherwise be considered an oval, button or drop pearl but which is not symmetrical in nature, would be considered semi-baroque. Semi-baroque pearls fall into the baroque category.
An Elegant Round Pearl Necklace is made of 5 Pearl at the bottom along with 4 single ones separated along the necklace. The necklace itself is made from Silver 925
A Single Pearl Necklace with a zircon stone on top. This beautiful necklace with it's special pendant style makes it one of a kind