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Hanadama is a Japanese word that means "flower pearl". Hanadama
Grade cultured pearls is a widely accepted pearl industry
standard that designates the highest quality of Japanese akoya cultured
pearls. Only approximately 2% of the annual Akoya cultured pearl harvest
qualifies for the Hanadama Grade. There is no grade better than Hanadama.
Hanadama Grade pearls must be certified by the Japan Pearl
Science Laboratory in Tokyo, Japan. Each pearl strand or jewelry item has
a unique numbered certificate issued by Japan Pearl Science Laboratory.
The certificate states that the strand is Hanadama Grade.
Pearl Oasis is the only on-line company which is able to
offer a full range of sizes of Hanadama pearls.
The Japan Pearl Science Laboratory uses a variety of testing
methods to determine Hanadama Grade quality. They include:
- magnification
- inner inspection by optical fiber
- spectro-photometric reflectance
- teri value analysis (luster value analysis)
- soft X-ray
The Japan Pearl Science Laboratory Hanadama Grade pearl quality
standard states that:
- The thickness of nacre of each pearl is guaranteed to
be at least 0.40MM.
(The measurement is from pearl surface to the center of pearl. Some on-line
pearl sellers misstate this figure. These sellers often say that nacre
thickness is 0.80MM when the JPSL certificate only guarantees 0.40MM.)
- The luster of each pearl is guaranteed to be at least
very strong. (determined by teri value analysis)
- The surface quality of each pearl is guaranteed to have
no more than very slightly imperfections. (determined by magnification).
The pearl lover can now compare “apples to apples” when
it comes to pearl quality. We offer the best prices for Hanadama Grade pearls
on-line. If you find a better price for the same size and length of Hanadama
Grade pearl, please let us know it. We will match it or offer you better
price. |
