Hanadama means the best or the highest quality range Akoya pearls. There cannot be a better grade. Even when comparing two strands of Hanadama pearls, while one may be slightly superior, it will still be Hanadama.
What Are Hanadama Pearls?
Although there is no standardized, definitive grading system in use today, that accurately represents and compares the value characteristics of Akoya pearls, there is a one-word description of the best Akoya pearl produced today: Hanadama.
Hanadama is a Japanese word meaning spherical flower. This is the name given to the highest-quality percentage of production by the founder of the cultured Akoya pearling industry, Kokichi Mikimoto. The Hanadama grade is still used to this day to designate the absolute best of each akoya pearl harvest by the world’s best-known pearl companies.
Hanadama Certificates Defined
The Hanadama certification is given by the Pearl Science Laboratory of Japan; located in Tokyo, Japan. A strand of pearls cannot be referred to as Hanadama unless accompanied by this certificate. The original certificate must accompany the strand; otherwise the strand is not Hanadama.
The Pearl Science Laboratory performs several tests on random pearls throughout the strand to determine its overall grade. The pearl surface is magnified and checked for inclusions. The nacre quality and depth is checked, by utilizing optical fibers and x-rays. The luster is determined by comparison. If all tests are performed and every value factor exceeds or meets the criteria, the strand is deemed Hanadama grade. It is important to note that only approximately half of the strands submitted for Hanadama analysis are accepted as such by the Pearl Science Laboratory.
How Hanadama Pearls Are Graded And Selected
The grading is not subjective, and must meet the following criteria:
• The nacre depth must not show to be less than .40 mm on any randomly tested pearl
• The teri-value analysis, (luster analysis) must be strong
• Imperfection grade must read very slightly
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