Pearls

Pearls are the only gemstones in the world created by living organisms

Natural pearls are exceptionally rare—so rare that even seasoned collectors may never encounter a perfectly formed natural pearl in their lifetime.
Today, nearly all pearls on the market are cultured. These pearls still form naturally inside the mollusk, but the process begins when a small nucleus is intentionally placed inside the oyster. These are known as natural cultured pearls.
The market is also filled with imitation pearls, which are non-organic materials designed to mimic the appearance
of real pearls.
Distinguishing imitation pearls from genuine natural or cultured pearls is simple. However, identifying natural pearls from natural cultured pearls requires advanced gemological testing.

Types of Pearls

	Freshwater Pearls Most accessible and affordable. Have vast spectrum of colors, from natural whites, creams, pinks, peaches, and lavenders to treated deep purples, golds, greens, and black. Short cultivation cycle and easier farming process. Primarily produced in China. Typically smaller in size and available in a wide range of shapes.

Akoya Pearls Cultured in Japan from a unique species of saltwater oyster. Have signature range of colour include: Celebrated for their near-perfect round shape and exceptional luster. Usually small in size but highly prized for their classic beauty.

	South Sea Pearls Known for the largest sizes among all pearl types. Cultivated mainly in Australia and the Philippines. Available in luxurious shades of white, cream, and gold. Rarity and size make them highly valuable.

Black Tahitian Pearls Produced by a special black-lipped oyster found mainly in French Polynesia. Known for naturally occurring dark hues ranging from charcoal to vibrant peacock green. Challenging cultivation and rare natural color contribute to their premium value.

Pearl Grading

Pearl quality is assessed across five key criteria:

LUSTER

High-quality pearls show sharp, bright reflections.

SURFACE QUALITY

Fewer blemishes indicate higher grade.

SHAPE

Perfectly round pearls are the rarest and most desirable, though symmetrical shapes are also sought after.

COLOR

While is classic, natural colors add depth and individuality.

NACRE THICKNESS

Thicker nacre indicates longer cultivation, resulting in better durability and value.
Typical size range: 2 mm to 16 mm.

Global Grading Systems

Hanadama Scale (Japan)

Tahitian System

Harmony Diamonds Standard

At Harmony Diamonds, we only source naturally cultivated saltwater pearls, in which we proudly adhere to the
Hanadama grading system and exclusively supply AAA-quality pearls — the highest standard of beauty, brilliance, and craftsmanship.