

-
A ring inspired by the everyday outfits of Neko Neko.
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The design features Nekoneko's beloved herbs connecting two jewels that are inspired by the colors of her hair ornaments. The decoration is sheer.
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You can enjoy wearing this ring, which is packed with attention to detail.
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The jewelry case is a special edition with gold foil stamping on a white background.
- Jewelry used
- Jade (approx. 3mm), rhodolite garnet, sky blue topaz (approx. 1.2mm)
- material
- Silver material (SV925 & gold plated) Gold material (K18YG)
- size
- Sizes 7 to 25 (can be specified in 0.5 increments)
Front width: 3.9mm, rear width: 1.1mm
Thickness: 1.2-3.9mm
- Price (tax included)
- Silver material: 25,800 yen Gold material: 89,800 yen




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A ring inspired by Jinshi's attire.
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The design is sharp yet elegant. The color of the costume is expressed with jewels that change color depending on the angle from which you look.
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You can enjoy wearing this ring, which is packed with attention to detail.
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The jewelry case is a special edition with gold foil stamping on a white background.
- Jewelry used
- Iolite (approximately 3mm),
Tanzanite (approx. 1.2 mm)
- material
- Silver material (SV925 & gold plated) Gold material (K18YG)
- size
- Sizes 7 to 25 (can be specified in 0.5 increments)
Front width: 3.2mm, rear width: 1.0mm
Thickness: 1.2-3.0mm
- Price (tax included)
- Silver material: 25,800 yen Gold material: 89,800 yen





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We used chrysoprase with a color that is carefully selected to match the world view of the work.
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These earrings are inspired by the earrings Nekoneko wore when she worked as a prostitute at banquets.
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A simple design that blends into everyday life.
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The jewelry case is a special edition with gold foil stamping on a white background.
- Jewelry used
- Chrysoprase (approx. 8mm)
- material
- Gold material (K18YG)
- size
- Total length: approx. 27mm (including 15mm chain)
- Price (tax included)
- 24,800 yen (gold material)
*Sold individually


By combining collaboration jewelry,
You can enjoy coordinating it.
- Neko Neko Model Ring & Jinshi Model Ring
- Neko Neko Model Ring & Neko Neko Prostitute Earrings
- All collaboration jewelry items
Precautions
- All images are for illustrative purposes only.
- All sizes are approximate and may vary slightly.
- Due to the characteristics of natural stones, there may be differences in color from the sample. Please rest assured that we inspect each gemstone individually to ensure that the image of the piece is not affected.
Collaborative Jewelry

The collaborative jewelry features a variety of colorful gemstones, including some purchased directly from around the world by gemologists.
The jade used in the Neko Neko model ring is gem-quality jade with a fresh transparency and a soft luster. The rhodolite garnet and sky blue topaz on the side were both chosen with an emphasis on color to recreate Neko Neko's hair ornament.
The Jinshi model ring features iolite and tanzanite purchased in Hong Kong, a major gemstone center. Both are richly pleochroic gemstones, allowing you to enjoy the way their colors change depending on the angle you view them from.
For more information on pleochroism, please click here.
KARATZ Gem Magazine "The Charm of Pleochroism | 8 Gems with Strong Pleochroism"
The chrysoprase used in the Neko Neko Prostitute earrings is a type of quartz. We carefully selected chrysoprase from Australia to recreate the color of the earrings that appear in the story.
To ensure long-lasting use, the base metal is gold-plated SILVER925 for silver materials, and K18YG (yellow gold) with a gold content of 75% or more is used for gold materials.
Enjoy the authentic jewelry that only KARATZ, a specialty jewelry store, can provide.
Jewelry purchase benefits
- Ring purchase bonus
- For each collaboration ring purchased, you will receive one free microfiber cloth. The design will depend on the model purchased.
Size: Approx. 150mm x 150mm
- Earrings purchase bonus
- For each pair of collaboration earrings purchased, you will receive one microfiber cloth and one acrylic card featuring a snapshot of the characters.
Microfiber cloth size: 150mm x 150mm
Acrylic card size: approx. 85mm x 54mm
Online Store
At the online store "Carats STORE",
We will be taking orders for collaborative jewelry.
- Period: 2025/9/11 (Thu) 22:00 - 10/13 (Mon) 23:59
- Delivery time: Scheduled for late December
- Shipping: Free for orders over 8,000 yen (tax included)
Pop-up store
At the pop-up store, you can see and touch jewelry samples, and try them on.
We also accept orders for jewelry, so please feel free to drop by.

- KARATZ Pop-up Store
in Shinjuku Marui Annex - Period: May 23rd (Fri) - May 29th (Thu)
- Location: Shinjuku Marui Annex 2F
- Opening hours: 11:00 AM - 8:00 PM
*Opens at 10:30 on Saturdays and Sundays *Closes at 6:00 PM on May 29th (Thurs)
- KARATZ Pop-up Store
in Hakata Marui - Period: June 12th (Thu) - June 15th (Sun)
- Location: Hakata Marui 3F
- Opening hours: 10:00 AM - 9:00 PM
TV anime "The Apothecary's Notes"
Season 2 Introduction

Nekoneko, the daughter of a pharmacist with an abnormal obsession with poison and medicine, and the mysterious and handsome eunuch, Jinji, take on more difficult cases that unfold in the palace.
"The Apothecary's Notes" is a hugely popular series that has sold over 40 million copies in total.
The first season, which began airing in October 2023, became a hot topic immediately after it aired, and it gained a lot of sympathy not only for Nekoneko's refreshing heroine character, but also for the serious mystery and the human drama that unfolds within the harem, making it a work that is loved by people of all ages and genders.
With the excitement still high, it has been decided that the second season will be broadcast in 2025!
When it is revealed that Princess Tamaha is pregnant, dark clouds begin to gather within the harem.
And then there is an unprecedented unsolved case in which Mitsuuji's life is put in danger.
The mystery leads to more mysteries, and more difficult cases await Nekoneko and Mitsuuji.
The harem mystery-solving entertainment is now opening again!
What is KARATZ?

Since its founding, KARATZ Co., Ltd. has been disseminating a wealth of information related to gemstones, primarily through its specialized gemstone information media, "KARATZ Gem Magazine" ( https://karatz.jp/ ), as well as through social media such as Twitter, Instagram, and Facebook, with the aim of providing a place where gem appraisers can disseminate accurate knowledge about gemstones and where anyone can feel free to ask for advice.
KARATZ Gem Magazine ( https://karatz.jp/ ) continues to provide a wide range of information, not only basic knowledge about gems, but also the differences between real and fake gems, how to tell them apart, and interviews with prominent figures in the gem industry.
It is notable for having many readers not only from the general public but also from within the industry, with over 150,000 monthly visitors, making it one of the largest jewelry-specializing media in Japan.
In addition, the company's representative, Koyama, purchases gemstones both domestically and internationally and sells them at his online store, Carats STORE.
Representative Koyama visits Thailand, Sri Lanka, Hong Kong, the United States, and other countries several times a year, and sometimes even goes directly to mines to purchase gemstones.
We use our experience of buying and selling over 10,000 gemstones to carefully select and purchase beautiful, high-quality gemstones.
Our semi-custom and custom-made jewelry using a wide range of gemstones is also popular, and we continue to work with skilled craftsmen in Japan to create high-quality jewelry that you can enjoy for a long time.