Rough Open Ring

(tax in) - Points Earned
Size (JP)
Pre order [Ships by Apr. 25]
  • All handcrafted by artisans in Japan
  • Free shipping to
  • All taxes and import duties included


An open ring with an asymmetrical design. It makes your fingers long and slender. You can wear it as a double ring or as a double-layered ring. It is a perfect match for the floating bezel diamond ring.

Handcrafted by artisans in Kofu, Japan.

1% for the Planet

For every purchase of PRMAL products, 1% of the purchase price will be donated directly to an organization working for forest conservation. Learn more.

Made in Japan
Ring arm: Width 1.3mm × Depth 1.3mm
Gem stone(s)

Laboratory Grown Diamond
Color: G UP / Clarity: VS2 UP / Cut: Good UP
Carats: 0.005ct * 9 (ct weight 0.045)

About Lab Grown Diamond

PRMAL's jewels are factory-directed with a commitment to quality and transparency. We connect our customers directly with jewelry factories.

We are committed to delivering the highest quality jewelry at a significantly less profitable price compared to the retail prices of traditional jewelry brands.

By making it easy to incorporate jewelry into your everyday life, we're making it easier for as many customers as possible to get the most out of it. We are convinced that we are able to convey the beauty of jewelry and the passion of our artisans.

Learn more about our fair price policy

All jewelry is dedicatedly handcrafted one by one for you, and we do not accept returns except for defective items.

Information: Free returns are available for in-stock orders for delivery within Japan only.

The following payment methods are accepted

  • Credit Card(Visa/Master/American Express/JCB)
  • PayPal
  • Apple Pay
  • JP: Amazon Pay
  • JP: Mobile app payment (LINE Pay/Merpay/PayPay)
  • JP: Bank Transfer

Payment must be made in a lump sum only.

Installment payment

This service is only available within Japan.

Secure online payment

Your communication will be encrypted with 256-bit SSL encryption. Credit card information is directly managed and processed by a payment processor that complies with the PCI-DSS international credit card security standard.

Delivery providers

  • All countries: DHL
  • Japan: Kuroneko Yamato

Shipment will be made from Tokyo, Japan. You can track your delivery with the tracking number provided in the shipment email.

Delivery days

In-stock items usually ship in 3-5 days, ordered items usually ship in 20-25 days, and engagement rings usually ship in 40-45 days from Japan. Please check the estimated shipping date at the top of the Add To Cart button after selecting the item.

  • In case of high shipment volume, the shipment may be made on the next business day or later.
  • We do not ship on Saturdays, Sundays, national holidays, year-end and New Year holidays, summer vacation, winter vacation, and temporary holidays.

Delivery Charges

Free worldwide express shipping.

Notes on use

Each piece of PRMAL jewelry is handcrafted with great delicacy. Please be careful not to drop or crash the jewelry.

  • Doing housework, bathing, sleeping, or playing sports may cause stains, discoloration, deformation, or damage. We recommend that you avoid wearing jewelry.
  • Itching or irritation may occur depending on the body constitution. If you experience any skin irritation, discontinue use immediately and consult a physician.
  • Use of the product in places with high temperatures, such as saunas or ski resorts, or in cold climates may cause burns or frostbite. Avoid wearing jewelry.
  • Please be sure not to wear when entering hot springs or seawater.
Care and Maintenance

To reduce dullness and stains caused by sebum, etc., wipe the product with a soft cloth after use and place each item individually in a plastic bag, pouch, case, etc. Avoid storing in the sun, extremely dry places, or places with high temperatures and humidity.

Repair and aftercare services

We offer various online completed after-sales services to ensure long-lasting use of our products. Please feel free to contact us.

Repair and aftercare services

All jewelry pieces are handcrafted by artisans in Japan, and we deliver them worldwide.

For shipments to the following areas, you only need to pay the amount indicated on the product, and you will not be charged any customs duty or other fees when you receive the product.

  • US
  • Canada
  • Hong Kong, China
  • South Korea
  • United Arab Emirates
  • Australia
  • Singapore

Products are settled in the local currency of the destination country. Product prices vary by area.

Shipment outside of supported areas

Products are priced in US dollars. In some cases, You may be required to pay customs duties and other fees upon receipt of the product. Please contact our customer serivce for a rough estimate of customs costs.

You can get in touch with our customer service team.

PRMAL customer service office
Business Hours: 10am - 5pm JST on weekdays

Inquiries received on Saturdays, Sundays, national holidays, year-end and New Year holidays, and other Company holidays will be handled on the next business day or later.

Customer Reviews
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Japan Japan



Japan Japan


昨年11月の六本木ヒルズのPopupで一目惚れして購入したラフオープンリングは、繊細でデザインに優れているのですが、一方で主張しすぎないので他の大ぶりなリングとも相性が良く重ね付けに大活躍しています。 いつものリングに程よく華やかさと洗練された印象を足してくれて、飽きのこないデザインです。 もちろん単独でも十分美しさを放ってくれます。

PRMAL Rough Open Ring Review
Japan Japan


去年の伊勢丹のポップアップストアで購入してから、毎日着用しています。 重ね付けがとにかくしやすくて、一粒ダイヤのリングを上から着けています! 華奢なデザインが手を綺麗に見せてくれるので、友達からもよく褒められます⭐︎

PRMAL Rough Open Ring Review
Japan Japan


もともとポップアップストアでこのリングを購入しており、とても気に入ったので 親友の誕生日プレゼント用に2つ目を購入しました。 細身ながら、デザイン性があるので1本のみで着けても十分可愛いです。 ごつめリングをした指の横につけても、ちゃんと存在感あります。 重ね付けしてもほど良いボリューム。 ほぼ毎日着けるくらい、使い勝手が良いです。 いろんな着け方ができるので ジュエリー好きの方へのプレゼントにもオススメです。

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our brand message: a beautiful choice

The choice
will make your life beautiful.

Your choice of jewelry is a choice of a way of life.

It's not something you can imitate or give away.
We choose a sustainable diamond for the future.