To celebrate the 45th anniversary of Sebonstar, we are launching a collaborative jewelry production project!

Sebonstar's limited edition pendant design and sparkling stone cut are reproduced with real gemstones to create authentic jewelry!

*All images are for illustrative purposes only. Specifications are subject to change.

Collaborative jewelry products

The jewellery we specialise in is from India,
Carefully selected and purchased in Sri Lanka, the cut of Sebon Star was reproduced after much trial and error. Furthermore, in order to express the "excitement" that Sebon Star has,
After detailed discussions with skilled craftsmen in Japan ,
I designed jewelry.

We will deliver jewelry that is perfect for your memorial year.

Sebonstar Jewelry for AdultsSebonstar Jewelry for Adults

Sebonstar Jewelry for Adults

"Adult Sebonstar" is the embodiment of your dreams.
The jewelry, which was voted number one by approximately 12,800 people, is based on the Sebonstar logo.
Pendant and ring available.
You can choose your favorite familiar gemstone for the heart part.

Adult Sebonstar Jewelry [Silver Model] & [Precious Model]

Based on the Sebonstar logo, the design combines the classic heart motif with a ribbon, appealing to the feminine heart.
The exquisite Sebonstar heart-cut gemstone is complemented by a sparkling diamond, creating a pendant that embodies the essence of Sebonstar.

  • The harmony of two colors. In the precious model, the silver colored parts can be changed to yellow gold or pink gold.
  • The delicate ribbon decoration resembles a tiara, and the diamond in the center is approximately 1.5mm.
  • Enjoy it with the adjuster charm featuring the familiar chocolate motif. *For more details, click here
  • Sebonstar jewelry, which is made with attention to detail, will beautifully decorate your chest.
  • A special pink jewelry case inspired by hexagonal packaging.

<Silver model>

  • Price (tax included)
    29,800 yen
  • bullion
    SV925 & Gold Plated
  • heart cut gemstone
    Choose from 5 types
    1. Almandine Garnet
    2. Peridot
    3. Amethyst
    4. Citrine
    5. Blue topaz approx. 5mm x 5mm
  • Side stones
    Diamond (VS class equivalent, D to G color, H&C) *For more details , click here
    Approximately 1.5mm x 1 stone, approximately 1mm x 2 stones
  • Included chain size
    Approximately 40cm
  • Motif size
    Approximately 13.8mm long, 13.0mm wide

<Precious Model>

  • Price (tax included)
    198,000 yen
    As announced in our NEWS, we have revised the prices of our precious models starting with the resale. Due to rising bullion prices and processing costs, it has become difficult to sell them at the previous prices, so we appreciate your understanding.
  • bullion
    Choose from 3 types for the inside of the heart
    1. Pt950
    2.K18YG (yellow gold)
    3.K18PG (pink gold)
    *The ribbon and heart edging and chain are all made of K18YG.
  • heart cut gemstone
    Choose from 5 types
    1. Almandine Garnet
    2. Peridot
    3. Amethyst
    4. Citrine
    5. Blue topaz approx. 5mm x 5mm
  • Side stones
    Diamond (VS class equivalent, D to G color, H&C) *For more details , click here
    Approximately 1.5mm x 1 stone, approximately 1mm x 2 stones
  • Included chain size
    Approximately 40cm
  • Motif size
    Approximately 13.8mm long, 13.0mm wide

Adjuster Charm

We have prepared a playful adjuster charm featuring the familiar chocolate motif.
This is an optional accessory that can only be purchased by customers who purchase a pendant.

  • Size: Approx. 12.5mm x 4mm
  • Silver model: SV925 & gold plated 15,800 yen (tax included)
  • *The adjuster charm cannot be purchased separately.
  • *The adjuster charm is only available in silver.
  • *The purchase bonus for each product does not come with the adjuster charm.
Purchase page here

Adult Sebonstar Jewelry [Silver Model] & [Precious Model]

The design is based on the Sebonstar logo and combines the classic heart motif with a ribbon, appealing to the feminine heart.
The exquisite heart-cut gemstone is complemented by a brilliant diamond. The classically curved ring arm beautifully adorns the hand, creating a ring that is full of attention to detail.

  • A classic and gorgeous ring arm. Luxuriously finished with plenty of base metal.
  • The ring arm is designed to resemble the end of a ribbon, resembling an arrow feather.
    You can adjust the size.
    *This product is delicate. Please be careful when adjusting it yourself.
  • Jewelry filled with the essence of Sebonstar will add a touch of elegance to your hands.
  • A special blue jewelry case inspired by the hexagonal packaging.

<Silver model>

  • Price (tax included)
    29,800 yen
  • Ring size
    S (about size 5 to 10)
    M (about size 11 to 16)
    L (about size 17-22)
    LL (about size 23 to 26)

    The ring is adjustable in size.
    *Applying excessive force may result in damage, so please be careful when changing the size.
  • bullion
    SV925 & Gold Plated
  • heart cut gemstone
    Choose from 5 types
    1. Almandine Garnet
    2. Peridot
    3. Amethyst
    4. Citrine
    5. Blue topaz approx. 5mm x 5mm
  • Side stones
    Diamond (VS class equivalent, D to G color, H&C) *For more details , click here
    Approximately 1.5mm x 1 stone, approximately 1mm x 2 stones
  • Motif size
    Approximately 13.8mm long and 17.2mm wide
    (Varies depending on ring size)

<Precious Model>

  • Price (tax included)
    198,000 yen
    As announced in our NEWS, we have revised the prices of our precious models starting with the resale. Due to rising bullion prices and processing costs, it has become difficult to sell them at the previous prices, so we appreciate your understanding.
  • Ring size
    Choose from sizes 7 to 25 in 0.5 increments
  • bullion
    Choose from 3 types for the inside of the heart
    1. Pt950
    2.K18YG (yellow gold)
    3.K18PG (pink gold)
    *The ribbon, heart edging, and ring arm are standard specifications for K18YG.
  • heart cut gemstone
    Choose from 5 types
    1. Almandine Garnet
    2. Peridot
    3. Amethyst
    4. Citrine
    5. Blue topaz approx. 5mm x 5mm
  • Side stones
    Diamond (VS class equivalent, D to G color, H&C) *For more details , click here
    Approximately 1.5mm x 1 stone, approximately 1mm x 2 stones
  • Motif size
    Approximately 13.8mm long and 17.2mm wide
    (Varies depending on ring size)
Purchase page here

Premium Sebonstar Jewelry for AdultsPremium Sebonstar Jewelry for Adults

Premium Sebonstar Jewelry for Adults

This premium jewelry uses the round B cut, which received many votes .
We have prepared an elegant and gorgeous pendant that incorporates the Charmy Pact design with the Sebonstar logo as its motif .
This pendant is luxurious yet playful.

Adult Sebonstar Jewelry [Charmy Premium Model]

The Charmy Premium model, adorned with pigeon blood ruby, is a special, top-quality pendant among Sebonstar jewelry for adults.
This ring is limited to one piece and features first-class gemstones such as diamonds, pink diamonds, and Akoya pearls as side stones.
*Lottery sales are planned.

Adult Sebonstar Jewelry [Charmy Precious Model]

An elegant and charming precious model with blue sapphire and tanzanite in the center.
Diamonds and white sapphires are used as side stones to enhance the round-cut gemstones.
*Limited quantity.

Adult Sebonstar Jewelry [Charmy Silver Model]

The Charmy Silver model has a luxurious appearance but is also designed to be suitable for everyday use.
You can choose your favorite from a lineup of approximately nine types of carefully selected round-cut gemstones.

  • *Specifications are subject to change.
  • *Details regarding price and size will be announced around January 2025.
  • *Sales are scheduled for late February 2025.
  • *The premium model will be sold by lottery.
  • *The Precious and Silver models are scheduled to be sold in stores and by order.
  • *Some items are limited in quantity.
  • *There are no plans to re-release the adult Sebonstar Jewelry [Silver Model] and [Precious Model] that were released in September.
  • Please note that we are unable to respond to individual inquiries.

Commitment to jewels

The collaboration jewelry uses a variety of colorful gemstones, including those directly purchased by gemologists from all over the world. In order to faithfully reproduce Sebonstar's distinctive cut, we directly interacted with skilled Indian craftsmen who are experts in handling gemstones, and after much trial and error, we arrived at a satisfactory quality.
The diamonds used for the side stones are carefully selected from VS class diamonds with D to G color and H&C. VS class diamonds have good transparency and are barely visible even under 10x magnification, the magnification used by experts to grade diamonds. Of the 23 color grades, only diamonds ranging from the highest D color (completely colorless and transparent) to the fourth-highest G color (near colorless with a yellowish tint that is difficult to detect with the naked eye) are carefully selected.

Additionally, H&C (Hearts & Cupid) is a design where the reflection of light reveals the shape of a heart and an arrow within the diamond. This design is packed with thrilling attention to detail, even in the details that are difficult to notice at first glance.
These gemstones are transformed into jewelry by skilled Japanese artisans, whose techniques have been honed through years of experience, making this collaboration a reality.
Enjoy the authentic jewelry that only KARATZ, a specialty jewelry store, can provide.

Purchaser benefits

Special Sebonstar jewelry case

Sebonstar is known for its hexagonal packaging. We have created an elegant jewelry case that faithfully replicates the way it is displayed in the candy section, making it suitable for grown-up Sebonstars. The suede-like fabric is accented with a glittery logo.
You can also store your favorite rings and pendants together.

<Color options>
Pink: Receive a free gift with the purchase of one pendant. Blue: Receive a free gift with the purchase of one ring. Lavender: Receive a free gift with the purchase of one premium jewelry item to be released at a later date. Size: Approx. 13cm x 4.5cm

*Customers who place an order at the event venue can take this case home with them. The jewelry will be delivered in a separate case. (Distribution will end once the planned number is reached. The jewelry case will be included with the product.)

Special guarantee card

Don't forget to get some chocolate to make your heart dance with Sebonstar.
A special guarantee card will be included, modeled after chocolate, featuring hearts, jewels, stars and other motifs that will tickle the hearts of young girls.
The back side incorporates the packaging design that encases the chocolate, and the essence of Sebonstar is packed into every detail.
This item will be included with each purchase of a Sebonstar collaboration jewelry item.

Size: Approx. 86mm x 26mm

Special shopper

We have prepared special original shoppers that are perfect for carrying Sebonstar jewelry for adults.
When you purchase at the Caratz Store, one gift card will be included with each piece of jewelry purchased.

What is Sebonstar?

Kabaya Foods' candy toys have been a best-seller since their release in 1979.
The distinctive, vertically long hexagonal box contains original pendant accessories and chocolates (as of 2024), and its cute design and wide range of colors have earned it the nickname "the jewel of the candy section."
It will celebrate its 45th anniversary in 2024.
 This product has long been loved not only by girls who love glitter, but also by adult women.

What is KARATZ?

Since its founding in 2017, Carats has been a company that continues to provide information about gemstones, with the hopes of "helping many people acquire correct knowledge about gemstones" and "being a place where anyone can feel free to ask questions about gemstones."
In addition to publishing the book "Gemstone Encyclopedia," the company also operates "KARATZ Gem Magazine" ( https://karatz.jp/ ), which is one of the largest gemstone information media in Japan and is used by many people (approximately 150,000 monthly visitors).
In addition, the jewelry specialty online store, Karatz STORE ( https://store.karatz.jp/ ), sells a wide variety of gemstones in a wide range of prices sourced from all over the world.

With the desire to encourage children in particular to become familiar with gemstones from an early age, we hold gemstone classes for children and their parents at elementary schools and commercial facilities, and also sell gemstone polishing sets that parents and children can try together, as well as gemstone playing cards that allow children to learn while they play.

The company is also well-known for the wide variety of gemstones it handles, and the president himself travels to various parts of the world, including Sri Lanka and Thailand, to purchase gemstones directly from the local area.

Regarding cuts that bring out the beauty of gemstones, we partner with polishing artisans both in Japan and overseas, and sell special cuts and original cuts that are only available at Caratz.
We purchase hundreds of thousands of gemstones each year, and offer a lineup that will satisfy a wide range of customers, from beginners experiencing gemstones for the first time to collectors.
We also create custom-made jewelry using beautiful gemstones sourced from around the world. We utilize the high technical skills and craftsmanship of our skilled Japanese artisans, who have decades of experience in jewelry processing technology, to create and deliver any design you desire.

Purchase here

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