The cleaner the surface of the pearl, the more valuable it is. Look for an absence of disfiguring spots, bumps or cracks on the surface of a pearl, also known as "cleanliness." Notice that the highest quality pearls have a sharp, mirror-like reflection.
Look for tiny irregularities
If the pearls are completely perfect and identical in terms of shape, size, colour and surface characteristics, they are probably fake. In addition, cultured and natural pearls reflect light differently from the fake ones. The lustre of fake pearls has a glassy look and is unnatural.
The lip determines the pearl color. While the white pearls are also priced by jewelers, the gold pearl variety is the most coveted color. The gold South sea pearl's color can range from creamy white to deep gold, and the darker the color, the more expensive it becomes.
It's pretty much impossible to tell the difference between a natural and cultured pearl by just looking at its outer appearance. The only way to make absolute certain whether a pearl is natural or not is to perform an x-ray of the internal structure of the pearl.
The qualities that determine the overall value of a natural or cultured pearl or a piece of pearl jewelry are size, shape, color, luster, surface quality, nacre quality, and—for jewelry with two or more pearls—matching.
The best quality of pearl is known as Lingha pearl obtained from marine oysters. The duration of formation of pearl is about 7 years. The pearl oyster belongs to genus Pinctada, family pteriidae, and class bivalvia and phylum mollusca.
Tiffany does not have it's own grading system (at least one that it publicly acknowledges), but Tiffany strands are generally AA quality on the Mikimoto grading standard and Tiffany prices its strands directly in line with with Mikimoto AA strands (which would be $5,400 for an 18" 7x7. 5mm strand).
Freshwater pearls are cheaper because they are easier to extract, making sea pearls more valued. Why? Sea pearls are larger, more beautiful in shape, luster, smoother surface and, of course, much more expensive than freshwater pearls.
Genuine pearls are solid and substantial, making them heavier than their faux counterparts. Try this pearl test; hold a loose pearl in your hand and feel its weight. If a loose pearl is light in proportion to its size, it is probably an artificial stone.
South Sea. South Sea pearls are often referred to as the Rolls Royce of pearls. They are the largest and most valuable pearls grown today, with average sizes ranging from 10 to 15 millimeters. South Sea pearls grow in a large pearl oyster native to Australia, the Philippines, Myanmar and Indonesia.
Any pearl that appears too white, dull or chalky, is of low quality. Within a pearl type, when other value factors are equal, the higher the luster, the more valuable the pearl. “Matching” A jewelry designer will sometimes deliberately mix colors, shapes, and sizes for unique effects.
Pearl Quality Factors
The combination of surface brilliance and a deep-seated glow, the luster of a good-quality cultured pearl should be bright, not dull. Your reflection should be seen clearly on the surface of a cultured pearl. Any pearl that looks too chalky or dull indicates low quality.
Not just because of the unique color, size, shape, and place of origin, but also accounting for the fact that these gems are made by living oysters. The price of a pearl now averages between $300-1,500, and there are a few factors to consider when questioning both quality and value.
Kailis pearls are unlike any other on Earth. Highly sought after, the Australian South Sea pearl is revered as one of the best varieties of pearls in the world. Born from the rare Australian Pinctada Maxima oyster, our Australian South Sea pearls have the thickest nacre and a magnificent lustre, to rival any other.
Black Pearls are very desired but extremely rare and expensive. White Pearls are the third most popular but has many astrological benefits. Thus, most people prefer White Pearls. Pearls are also available in other colours such as blue, silver and pink.
When compared to other varieties, such as Tahitian and South Sea, Akoya pearls definitely offer good value for money without compromising on beauty. Freshwater pearls lack the deep, beautiful gleam of an Akoya. However, the palette of colors and attractive pricing makes them a great option for many people.
Pearls with particular brand names will also retain (and even increase) their value over the years; vintage Mikimoto Akoya pearls that still have their original clasp, box and papers to establish provenance are very highly sought after today and continue to fetch premium resale values.
This is because a real pearl has small ridges on its surface. These ridges may not be visible to the naked eye. However, experts and jewelers can check the “natural flaws” in a pearl using a magnifying object. In real pearls, these same ridges can be felt using the teeth.
Like many things in life, pearls age. As these precious gems age, they go through a natural process that changes the composition of the organic substances that make them up. This causes them to change color. Yellow pearls typically indicate that pearls are real, since artificial pearls don't normally change color.
FTC Jewelry Guidelines refer to the definitions of pearls: Natural pearls are made by oyster and other mollusks. Cultured pearls are grown by mollusks, but with human intervention: an irritant introduced into the shells causes a pearl to grow. Imitation pearls are man-made with glass, plastic, or organic materials.
The Vinegar Test
A real pearl will dissolve in vinegar or show erosion where the vinegar drop meets its surface. This is because of the chemical reaction between the acid in the vinegar and calcium carbonate, the primary chemical that a real pearl is made of.
You can also tell the difference by their shape. Freshwater pearls are typically round or oval in shape, while saltwater pearls come in a variety of shapes including round, baroque, and drop.