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About quality assurance

Proof of product

All YON products are engraved with the YON brand signature as proof that they are made in YON.


Precautions about counterfeit products

Please purchase YON products at the YON official online shop.
Please be careful about products called YON products sold outside the regular stores and counterfeit products.


Commitment to materials

・GOLD
【YON Gold]
YON Gold products use K14 (14 gold) and K10 (10 gold), and are available in yellow gold and white gold, respectively.

[Properties /Characteristics]
Pure gold does not change forever in the air or water and does not rust.
However, it is very soft, so when using it as jewelry, add a metal (split) such as silver or copper to increase its hardness.
The unit is K (carat), which represents the content of pure gold, and is expressed in parts per 24.

K24 (24 gold) is pure gold, K14 (14 gold) is 14/24 (58.3%) pure gold, and the remaining 41.7% is a discount. For K10 (10 gold), 10/24 (42%) is pure gold and the remaining 58% is a discount.
By changing the content of this ratio, color variations such as yellow gold, pink gold, and white gold are created, which is also a major feature of gold.
White gold is finished with a rhodium coating. If the color becomes dull, we recommend refinishing the rhodium coating.

・ SILVER
[YON's silver]
YON's silver products have the hardness most suitable for jewelry, called Sterling Silver, which was put into practical use in the 12th century in the United Kingdom. I am using my SV925.
The reason for its popularity is that the more you use it, the more unique texture and texture it creates.

[Characteristics /Characteristics ]
If you touch the air for a long time, it will be covered with an oxide film and darken, but you can easily clean it with a silver cleaner etc. You can use it for a long time.
Although it is a material that is easy to process, sterling silver is too soft for jewelry, so it is common to use alloys with copper or the like added.
The unit is SV1000 is sterling silver, and depending on the amount of the discount, it is displayed as SV950 (95% silver, 5% discount), SV925.

-Catch (pierced earrings)
[YON's catch ]
All of YON's attached catches use side push type disc catches.

【Properties /characteristics】
The side push type disc catch is a catch that is hard to fall off by pressing the button on the side to unlock it.

Warranty /Repair

■ 1 year warranty
We accept repairs for defects that occur during normal use free of charge for 1 year after purchase.
However, damage due to intentional accidents, loss of main parts of the product, resizing, etc. are excluded.
* There may be a charge depending on the condition of the product.

■ Repair flow
For various repairs related to YON products, please use the online shop inquiry form.
However, please note that repair may not be possible depending on the condition.
Please contact us from the inquiry form together with the sales certificate (warranty) of the product to be repaired.
To prevent accidents during delivery, please pack the product and send it to the following address by registered mail or courier. In addition, please contact the following in advance when sending it.

5F, Odo Building, 1-14-10 Higashiueno, Taito-ku, Tokyo 110-0015
YON Customer Service
Contact us from the inquiry form Click here

■ Repair fee
Problems that occur during normal use are free for one year after purchase. We accept repairs.
However, damage due to intentional accidents, loss of main parts of the product, resizing, etc. are excluded.
In addition, repairs will be charged if more than one year has passed, but the price will vary depending on the material, design, and repair details, so please contact us.
The purchase date will be confirmed on the date stated on the product sales certificate (warranty).
Please note that if you cannot confirm the purchase date, you will be charged even if it is within one year from the purchase date.

■ Days required for repair
The repair period depends on the material, design, and condition. After confirming your product, we will inform you of the required number of days.



Jewelery care

YON products are available for cleaning for a fee, so please feel free to contact us using the inquiry form .
In addition, it may take some time depending on the reception situation.

■ Wearing jewelry
When doing housework, bathing, going to bed, playing sports, etc., it may cause stains, discoloration, deformation or damage, so please remove it once. I recommend it.

■ How to store jewelry
To reduce dullness and dirt caused by sebum, wipe it with a soft cloth after use, and then wipe each piece individually with a plastic bag, pouch, or case. Please put it in such as. Also, avoid storing in a sunny place, an extremely dry place, or a hot and humid place.

■ How to care
We recommend regular cleaning so that you can use your precious jewelry for a long time. Please use a special cleaner for cleaning.

■ If silver discolors
Silver products tend to discolor when exposed to sweat, hot springs, seawater, etc.
Also, since the surface is sulfurized and discolored due to substances contained in the air, it is necessary to be careful not to touch the air even when storing it.
After use, immediately wipe off dirt such as sweat and oil with a soft cloth, and store it in a plastic bag with a zipper.
Also, in order to prevent discoloration as much as possible, it is recommended to wash it regularly with a polish or cleaner specially designed for silver products.
However, some products may not be available depending on the material such as stone. For more information, please contact us using the contact form .

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