THIRD REASONS
[third reasons] KOSA CHAIN BLACK ONYX NECKLACE silver925 - Necklace
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DETAILS & SIZING
The oval black onyx pendant top is integrated with the bail for the chain, creating a unique silhouette with an organic form.
This necklace features a flexible, minimalist, and sleek rounded snake chain, making it simple yet distinctive.
A special piece of jewelry meticulously crafted by skilled artisans.
| Size | Chain width チェーン幅 |
Pendant Top ペンダントトップ |
Weight 重さ (チェーン+ヘッド) |
| 40cm | 3mm | W23 x H 17mm | 36.4.g |
Onyx
NECKLACE SIZE GUIDE
Measure the size
▪︎Use a string or thread and cut it to your desired length. Check the length with a measuring tape.
▪︎The diagram below shows approximate lengths. Please note that the length may vary depending on the thickness of your neck.
▪︎If you want to layer necklaces, please check how different lengths look when worn together.

CARE
・Handle jewelry with care and avoid activities that may cause scratches.
・Remove jewelry before going to bed, showering, or washing your hands.
・Be careful around chlorinated swimming pools and household detergents.
・Avoid contact with cosmetics, perfumes, and other oily or alcoholic substances.
・Avoid contact with hard objects or applying strong force.
・Exercise caution when opening and closing earrings and chains.
[After Use]
Jewelry may tarnish over time, with its surface oxidizing and becoming darker and less lustrous. To prevent this, polish your jewelry using a soft cleaning cloth.
PAYMENT_SHIPPING
Shipping
Free shipping on purchases of 33,000 yen (tax included) or more
Nationwide flat rate: 660 yen (excluding some areas)
Okinawa/Hokkaido: 1430 yen
Delivery: Please check the estimated delivery date
Return
As a general rule, we do not accept cancellations, returns, or exchanges of products due to customer convenience.
Thank you for your understanding.
Payment
Various credit cards
PayPay
Rakuten Pay
Paidy (post-payment)
or PayPal is available.
International Shipping
Rates vary
Customs duties and taxes are not included.
need help?
Please feel free to contact us with any questions about our products, styling advice, or feedback.
We look forward to connecting with you and having the opportunity to chat.
CONTACT FORM
* The color of the product images may vary depending on the lighting conditions during photography and your monitor's display settings.
*Please note that the product delivered may have slight variations in design even if it is the same.

about
Third reason
Third reasons' Oksana Bevz is a Los Angeles-based jewelry designer. Drawing on her background in interior design, she creates unique jewelry inspired by architecture and everyday objects. Using ancient lost-wax casting techniques, her brand is one-of-a-kind, producing high-quality pieces with an environmental conscience.





