PEARL QUALITY

TASAKI's Pearl Evaluation
Criteria and Quality

GRADING

What Makes TASAKI Pearls
so Special?

Since its establishment, TASAKI has utilised strict evaluation criteria to choose only the finest pearls. By conducting aquaculture in nutrient-rich seas, selection and processing by skilled craftspeople, and managing the sale of pearls and all other processes in-house, we ensure that only the highest quality pearls are introduced to the market as TASAKI pearls.

Selection Ratios of
TASAKI-Quality Pearls

Only few of the precious pearls harvested meet the stringent requirements of
'TASAKI Quality' suitable for TASAKI jewellery.
Of these TASAKI Quality pearls, less than 2% possess the perfect combination of size,
roundness, and quality required for use in our 'balance' and 'danger' collections.

5 CRITERIA

5 criteria to determine
the value of pearls

01

Nacre quality - the key
factor in determining
a pearl's value

02

Brilliant lustre
symbolising splendour

03

Colour, determined
by nacre and lustre

04

High-value round pearls,
as well as diverse shapes,
including distinctive baroque pearls

05

Pearl size,
a factor in
determining price

01

Nacre quality - the key factor in
determining a pearl's value

Nacre quality, indicating the thickness of the nacre layer, is paramount in determining the quality of a pearl. A certain thickness of the nacre layer is essential for achieving beautiful interference colour or lustre. TASAKI focuses on this critical quality aspect, the nacre layer, when selecting pearls.

Core

Approx. 7.5mm

Core

7mm or less

Common pearls
on the market

TASAKI PEARL

02

Brilliant lustre
symbolising splendour

Lustre is intrinsically linked to nacre. Surface brilliance, which reflects light on the surface, and internal brilliance, resulting from light interference within the nacre layer, work together to create the pearl's lustre. The greater the thickness and uniformity of a pearl's nacre layer, the more exceptional the lustre.

Weak-lustred pearl

Strong-lustred pearl

03

Colour, determined
by nacre and lustre

Although the colour of pearls is largely determined by nacre interference, the complex and reciprocal relationship between colour and lustre also plays a defining role. Because TASAKI cultivates its own pearls, particularly Akoya pearls, we can provide a wide array of colours to suit various occasions and preferences, including yellow, blue, pink, green, and silver.

04

High-value round pearls,
as well as diverse shapes,
including distinctive
baroque pearls

Pearls are typically round in shape, with those that are perfectly round or nearly round being the most highly valued. Nonetheless, pearls come in a variety of shapes, and exceptionally unique and beautiful gems are also found among the semi-round, teardrop, and Baroque categories. TASAKI leverages the individuality of such charmingly shaped pearls in its pieces.

Round

These pearls are perfectly round. With increasing roundness, the production quantities decrease, whereas their rarity and value escalate.

Semi-round

The term 'semi-round' refers to pearls that are nearly round, yet not quite enough to be classified as such. These pearls offer an ambience distinct from that of round pearls.

Teardrop

These pearls are naturally formed in teardrop shapes. Designs that utilise this shape evoke a feminine and sophisticated atmosphere.

Baroque

No two pearls are identical in shape, allowing you to appreciate the uniqueness of their irregular forms. The allure of these pearls is found in their singular, unique designs, each crafted by nature.

05

Pearl size, a factor
in determining price

The diameter of a pearl, which measures its size, does not directly reflect the quality of its nacre. Pearls are commonly sold by weight, and there is a greater market demand for larger pearls. As a result, when all other quality factors are equal, larger pearls typically command a higher price. However, in recent years, due to changes in supply and demand, smaller pearls can also achieve high prices.