Not all pearl certificates are the same.
Some certificates only confirm whether a pearl is genuine. PSL goes much further by analyzing details that experienced pearl buyers actually care about:
Luster (TERI)
Nacre thickness
Surface quality
Shape
Natural color verification
This is especially important for Akoya pearls because two strands may look similar at first glance, while their luster and quality can be completely different in person.
PSL certificates help buyers understand those differences more clearly.
The TEN-NYO is essentially a Hanadama but they are at the top of the grading scale.
For a strand of pearls to be considered TEN-NYO, it must firstly be certified as Hanadama.
Only after passing Hanadama standards can the pearls undergo additional Aurora Tennyo testing.
This is why Aurora Tennyo pearls are much rarer.
How to Identify Natural Grey Akoya Pearls
The most important detail on both certificates is the statement confirming that the pearl color originates from organic sources.
This indicates the pearls are natural color and have not undergone irradiation or artificial dye treatment.
What Color of Akoya Pearls Have? Akoya pearls have white, silver-blue (gray), and yellow colors. Which size can be divided into? According to the size of the certificate, it can be divided into more than 6mm and less than 6mm. White akoya pearls: The best gem quality ＞ 6mm is named Aurora Tennyo The best gem quality ＜ 6mm is named Aurora Sairindama Silver-blue akoya pearls: The best gem quality ＞ 6mm is named Aurora Madama The best gem quality ＜ 6mm is named Aurora Saiundama What is Sairindama? Sairindama is the same quality as Hanadama, it is the highest quality akoya of the white series with a diameter less 6mm. What is Saiundama? Saiundama is the same quality as...
But do you really know about TEN-NYO? The word TEN-NYO can be directly translated as "A lady from heaven". TEN-NYO Pearls, must first qualify as Hanadama Pearls, and undergo additional stringent tests. The TEN-NYO is essentially a Hanadama but they are at the top of the grading scale. For a strand of pearls to be considered TEN-NYO, it must firstly be certified as Hanadama. Next comes the testing of the 'Teri'of the pearls to determine whether the strand of Hanadama pearls are worthy to be called TEN-NYO. Teri is the word for the light interference which occurs on the surface of the nacre. Testing of this Teri can only be done with a special device called the 'Aurora Viewer' and...
