
A collaboration project to commemorate the 8th anniversary of "Bungo and Alchemist."
From a total of 82 characters, the top 12 were selected for jewelry adaptation, and this time we are introducing jewelry made with Chuya Nakahara, Ango Sakaguchi, and Takiji Kobayashi as models.
The order of publication and jewelry adaptation
is not related to the number of votes.

A ring inspired by Chuya Nakahara's costume. The arm design reproduces the argyle pattern of the vest Chuya wears. Matte processing and dot engraving are used to create a three-dimensional representation of the costume's splendor.

The orange sapphire set in the center was carefully selected for its orange color, which is closer to the image color. Black diamonds, reminiscent of the costume's color, were chosen for the side stones.
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PriceSilver (SV925 & Rhodium): 25,800 yen
Platinum (Pt950): 98,000 yen -
GemsOrange Sapphire (1.5mm) x 1
Black Diamond (1.0mm) x 2 -
Size2.8mm (front width), 1.6mm (back width),
Sizes 7 to 20 (can be specified in 0.5 size increments)

A ring inspired by Ango Sakaguchi's costume and belt pattern. Two gems are connected by a design motif of a waist ornament, and the belt pattern is expressed on the arm. While retaining the character's flamboyant atmosphere, the design is cool and refined.

We chose iolite, which is mindful of the image color, and black spinel, which is reminiscent of the costume's color.
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PriceSilver (SV925 & rhodium plating): 25,800 yen
Platinum (Pt950): 98,000 yen - GemsIolite (2mm) x 1, Black Spinel (2.0mm) x 1 (all natural)
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Size2.7mm (front width), 1.5mm (back width),
Sizes 7 to 20 (can be specified in 0.5 size increments)

A ring inspired by Takiji Kobayashi's weapon and belt.
The right arm represents the weapon, and the left arm represents the belt.
A gear is set in the center, creating a design with a sense of unity despite combining various elements. Furthermore, the combination of gold and silver expresses the shining light born from darkness.

An iolite, inspired by the hair color, is set in the center of the gear, and green sapphire and ruby, reminiscent of the image color, were chosen as side stones.
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PriceSilver (SV925 & Rhodium Plating & Gold Plating): 25,800 yen
Platinum & Gold (Pt950 & K18): 118,000 yen -
GemsGreen Sapphire (2.0mm) x 1,
Iolite (1.0mm) x 1, Ruby (1.2mm) x 1 -
Size6.0mm (front width), 1.6mm (back width),
Sizes 7 to 20 (can be specified in 0.5 size increments)
Jewelry Case

An original jewelry case with the work's logo is included.
- (Notes)
- ・All images are for illustration purposes only.
- ・All sizes are approximate. Slight errors may occur.
- ・Due to the nature of natural stones, there may be differences in color from the sample. Please be assured that each gem is inspected carefully so as not to spoil the image of the work.
Our Commitment to Collaboration Jewelry

The collaboration jewelry features a variety of gemstones, some of which are directly sourced by our gemologists from around the world, primarily Hong Kong and Sri Lanka. We carefully select beautifully and precisely cut gemstones to maximize their inherent charm. We use almandine garnet, appealing for its reddish-brown hue, Swiss blue topaz, striking for its clear coloration, and chrysoprase, meticulously polished from rough stones. Even with similar tones, each stone has a different sparkle and nuance, delicately expressing the individuality of each character. Furthermore, the diamonds are high quality, equivalent to VS class, with a beautiful H&C (Heart and Cupid) cut. Their excellent brilliance, visible to the naked eye, further enhances the overall perfection of the jewelry. For long-lasting enjoyment, the silver material (SILVER925) is rhodium-plated to prevent oxidation and discoloration. For platinum material, we use Pt950 with a purity of over 95%. Please enjoy authentic jewelry that only KARATZ, a specialized gemstone store, can offer.
Collaboration Ring Purchase Benefits

For each purchase of a Chuya Nakahara, Ango Sakaguchi, or Takiji Kobayashi model ring, you will receive one acrylic stand. The character of the bonus will correspond to the purchased character.
Limited-Time Purchase Benefits

For each purchase of a Chuya Nakahara, Ango Sakaguchi, or Takiji Kobayashi model ring, you will receive one acrylic card. The character of the bonus will correspond to the purchased character.Period: May 28 (Thu) - July 31 (Fri)
All images are for illustration purposes only.
There may be some differences from the actual product.
Online Store
We will be taking orders for collaboration jewelry at our online store "KARATZ STORE".
- KARATZ STORE
- Period: May 28 (Thu) - July 31 (Fri)
Delivery Period: Scheduled for late September
Shipping: Free for orders over 8,000 yen (tax included)
Pop-up Store

At the pop-up store, we will be accepting orders for jewelry.
You can also try them on, so please feel free to stop by.
- KARATZ Pop-up Store in Shinjuku Marui Annex
- Period: May 28 (Thu) - June 3 (Wed)
- Location: Shinjuku Marui Annex 1F
- Business Hours: 11:00 AM - 8:00 PM
- *Saturdays and Sundays open at 10:30 AM *Only on June 3 (Wed) scheduled to close at 5:30 PM
To commemorate the 7th anniversary of "Bungo and Alchemist," the first collaboration jewelry featured rings for Osamu Dazai, Ryunosuke Akutagawa, and Kyoka Izumi. In addition, a limited edition 7th anniversary gear brooch was sold.
The second collaboration jewelry for "Bungo and Alchemist" featured rings for Hakushu Kitahara, Haruo Sato, and Shusei Tokuda.
The third collaboration jewelry for "Bungo and Alchemist" featured rings for Sakunosuke Oda, Ranpo Edogawa, and Kan Kikuchi.
About KARATZ

KARATZ Co., Ltd. was established with the desire for gemologists to disseminate correct knowledge about gemstones and provide a place where anyone can easily consult. Since then, we have continued to provide a wealth of information about gemstones, mainly through our specialized gemstone information media "KARATZ Gem Magazine" (https://karatz.jp/), as well as through social media such as Twitter, Instagram, and Facebook.
"KARATZ Gem Magazine" (https://karatz.jp/) continues to disseminate information on a wide range of topics, including basic knowledge of gemstones, how to distinguish between genuine and fake, and interviews with prominent figures in the gem industry.
It is characterized by having many readers not only from the general public but also from the industry, with monthly visitors exceeding 150,000, making it one of the largest specialized gemstone media in Japan.
In addition, the gemstones purchased by our representative, Koyama, both domestically and internationally, are sold on our official online store "KARATZ STORE".
Our representative, Koyama, visits Thailand, Sri Lanka, Hong Kong, and the United States several times a year, sometimes even going directly to the mines to purchase gemstones.
Utilizing over 10,000 transactions of experience, we carefully select and purchase high-quality and beautiful gemstones.
We are also well-regarded for creating semi-custom and custom-made jewelry using a wide range of gemstones, and in collaboration with skilled domestic craftsmen, we continue to create high-quality jewelry that can be cherished for a long time.








