Mori Pearl's pearl quality
Quality of MORI PEARLIntroducing the quality of pearls offered by Mori Pearl
High-quality pearls carefully selected by pearl professionals
At Mori Pearl, every single pearl is inspected rigorously and carefully.
In order to deliver pearls that will last a lifetime and accompany you throughout your life, we approach pearls with high quality and safety as our top priorities.
For inspection, we use a light check, which shines light through the pearl to check the nacre and nucleus.
If the light check reveals that the nucleus is cracked, the pearl is discarded no matter how beautiful it may appear, as it may break during use.
The reason we are able to check everything before purchasing is because of the strong relationship of trust between Mori Pearl and the producers.
That is why Mori Pearl only stocks carefully selected pearls that make up about the top 30% of high quality pearls .

The main criteria for determining pearl quality
Mori Pearl has four unique standards for judging pearls.
Pearls that are excellent in all these respects are then further evaluated on factors such as size and color.
The Standard Collection Akoya pearl necklaces, a classic Mori Pearl item, are available in ranks based on the following criteria.
To give you peace of mind when purchasing, we include a grading report that analyzes the quality of the pearls.
*Products other than Akoya pearl necklaces are offered at regular or higher quality, so we do not include grading reports.
01
Rolling
02
Teri
03
surface
04
shape
01 Roll
It refers to the thickness of the nacre, and the thicker the layer, the better the quality.
Thicker pearls are able to absorb more light from the outside, reaching deeper layers, resulting in more beautiful interference colors and luster.
Pearls that have been cultivated for a short period of time tend to have thinner layers, but at Mori Pearl we use X-ray inspection to determine the thickness and only handle pearls that are 0.4mm or thicker .

02 Teri
This refers to a light phenomenon unique to pearls.
The combination of the gloss of the surface and the interference of light reflected from the nacre creates a luster, giving pearls their unique brilliance.
The more uniform the nacre is, the more light it reflects, resulting in a beautiful, lustrous shine.


03 Surface
The grade of the pearl surface, such as the presence or absence of scratches (dimples), their type, and smoothness, is determined into six ranks.
The natural scratches that occur during the cultivation process vary from slight surface marks to large protrusions.
Generally speaking, the smaller and fewer the blemishes, the more valuable the pearl is. Mori Pearl usually uses pearls of 2S or higher , but we select beautiful pearls from a comprehensive perspective, including the balance of their luster and shape.

04 Shape
It is judged into four ranks: round, semi-round (almost round), semi-baroque (slightly irregular), and baroque (irregular).
The closer to a perfect sphere, the more beautiful the interference will be, and round is generally considered to be the rarest and most highly valued.
There are also other unique shapes that are only possible in natural products, such as ovals (vertically long) and drops (teardrop shapes), and we are particular about designs that beautifully highlight each shape.
Three initiatives to ensure safe use
Certificate card provided
All customers who purchase products from Mori Pearl are given a certificate card listing the product name and purchase date for each product.
This card certifies that the product has passed Mori Pearl's strict inspection standards and has been officially sold by our store, so you can feel safe giving it as a gift to a special person.

Warranty service
◆ Example of warranty contents
- Gluing pearls that have fallen off
- Adjusting the fittings
◆ Warranty period
One year from the date of purchase. *If the warranty period has expired, please contact Shinju Hospital for advice.
◆ How to handle repairs
Please apply for repairs in advance by calling us (TEL: 03-3246-1492 ) or using our inquiry form.
If you wish to have an item repaired, please bring it to the Mori Pearl Shop & Gallery in person, or send it by mail or courier.
(Please note that you will be responsible for the shipping costs when sending the product back to us. We will cover the cost of returning the product after repairs.)
*When undergoing repairs, please be sure to present your certificate card or Mori Pearl engraving.
Pearl Aftercare Service
In addition to the above warranty, we also provide free aftercare service for products purchased from our store.
If you would like to receive aftercare service, please present the certificate card provided to you at the time of purchase.
Necklace string replacement
Once purchased, you can use it as many times as you like.
In order to ensure long-term use, it is important that the product is not only beautiful to look at, but also comfortable to use.
We recommend changing the threads regularly.
Ring Sizing
We will provide one free resizing service within one year from the date of purchase.
*A fee will be charged from the second time onwards.
They are passed down from parent to child, with alterations made over the years.
One of the great charms of pearl rings is that they can be worn in a way that transcends the ages.
Pearl Cleaning
Delicate pearls require regular maintenance to maintain their beauty forever.
Please use it when you notice dirt or dullness.

For products purchased elsewhere, Shinju Hospital will provide aftercare, so please feel free to contact us.