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パイロープ・スペサルティンガーネット（カラーチェンジガーネット） 1.297ctルース

Pyrope spessartine garnet (color change garnet) 1.297ct loose Sale price¥39,800
パイロープ・スペサルティンガーネット（カラーチェンジガーネット） 1.234ctルース

Pyrope spessartine garnet (color change garnet) 1.234ct loose Sale price¥35,800
パイロープ・スペサルティンガーネット（カラーチェンジガーネット） 1.171ctルース

Pyrope spessartine garnet (color change garnet) 1.171ct loose Sale price¥35,800
【金平糖】アイオライト 3.170ctルース

[Konpeito] Iolite 3.170ct loose Sale price¥27,800
【カラフリ】Pt950アレキサンドライト0.08ct リング - カラッツSTORE

[Colorful] Pt950 Alexandrite 0.08ct ring Sale price¥98,000
【12533748掲載】コーネルピン 0.520ct原石

Cornelpine 0.520ct rough stone Sale price¥3,980
コーネルピン 0.500ct原石

Cornelpine 0.500ct rough stone Sale price¥4,980
【12533740掲載】コーネルピン 0.890ct原石

Cornerpine 0.890ct rough stone Sale price¥5,980
コーネルピン 0.880ct原石

Cornelpine 0.880ct rough stone Sale price¥3,980
【12533736掲載】コーネルピン 0.740ct原石

Cornelpine 0.740ct rough stone Sale price¥3,980
コーネルピン 0.400ct原石

Cornerpine 0.400ct rough stone Sale price¥2,980
コーネルピン 0.730ct原石

Cornerpine 0.730ct rough stone Sale price¥2,980
コーネルピン 0.490ct原石

Cornelpine 0.490ct rough stone Sale price¥2,980
ローズクォーツ 8.640ctルース

Rose quartz 8.640ct loose Sale price¥3,980
ピンクオパール 7.180ctルース

Pink opal 7.180ct loose Sale price¥8,800
【12530558掲載】アンダリュサイト 0.480ctルース

Andalusite 5mm/0.480ct loose Sale price¥5,980
ピンクダイヤモンド 0.191ctルース(VERY LIGHT ORANGY PINK, SI2)

Pink diamond 0.191ct loose (VERY LIGHT ORANGY PINK, SI2) Sale price¥59,800
シーブルーカルセドニー 6.964ctルース

Sea blue chalcedony 6.964ct loose Sale price¥7,980
ホーランダイトインクォーツ 7.300ctルース

Hollandite in quartz 7.300ct loose Sale price¥25,800
【カラフリ】Pt900ボルダーオパール15.82ct ペンダントトップ（ネックレストップ） - カラッツSTORE

[Colorful] Pt900 Boulder Opal 15.82ct Pendant Top (Necklace Top) Sale price¥69,800
【カラフリ】K18ロッククリスタルペンダントトップ（ネックレストップ） - カラッツSTORE

[Colorful] K18 rock crystal pendant top (necklace top) Sale price¥39,800
スキャポライトキャッツアイ 8.880ctルース

Scapolite Cat's Eye 8.880ct Loose Sale price¥8,800
Bicolor spinel 1.17ct loose

Bicolor spinel 1.17ct loose Sale price¥79,800
Cambodian Blue Zircon (Ratanakiri Blue) 23.12ct Loose

Cambodian Blue Zircon (Ratanakiri Blue) 23.12ct Loose Sale price¥498,000
スキャポライト 5.57ctルース

Orange Scapolite 5.57ct loose Sale price¥19,800
Euparite 193g

Euparite 193g Sale price¥39,800
K18タンザナイト1ct リング - KARATZ STORE｜カラッツSTORE

K18 Tanzanite 1.0ct Ring Sale price¥79,800
イエローダイヤモンド 0.190ctルース(FANCY DEEP ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.190ct loose (FANCY DEEP ORANGY YELLOW, SI2) Sale price¥39,800

Additional fee: 7,500 yen Sale price¥7,500
[Made to order] "Rhino Ring" by special modeling artist Masatoshi Asami {Exhibited at Ueno Marui}

[Made to order] "Rhino Ring" by special modeling artist Masatoshi Asami {Exhibited at Ueno Marui} Sale price¥158,000

Additional charge for resizing: 9,750 yen Sale price¥9,750

Additional charge for resizing: 6,750 yen Sale price¥6,750

Additional charge for resizing: 8,250 yen Sale price¥8,250

Additional charge for resizing: 9,000 yen Sale price¥9,000

Additional fee: +1,000 yen Sale price¥1,000

Repair cost + 2,500 yen Sale price¥2,500
coming soon [Available at 10:00 PM on December 10, 2025] Adult Sebon Star Pendant Silver Model (SV925)

[Available at 10:00 PM on December 10, 2025] Adult Sebon Star Pendant Silver Model (SV925) Sale price¥29,800
Sold out 【お子様限定】宝石磨きに挑戦してみよう「自分で出来る原石磨きセット」（フローライト・宝石アイシングクッキー付き）

[For kids] Let's try gem polishing "Do-it-yourself rough stone polishing set" (includes fluorite and gemstone icing cookies) *Subject to gemstone polishing contest*

coming soon [Available at 10:00 PM on December 10, 2025] Adult Sebonstar Ring Silver Model (SV925)

[Available at 10:00 PM on December 10, 2025] Adult Sebonstar Ring Silver Model (SV925) Sale price¥29,800
Sold out 宝石研磨に挑戦してみよう「自分で出来る原石磨きセット」（中級者向け：アンデシン）

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for intermediate users: iolite rough stone)
Sold out [Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones

[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones

Sold out 「起源がわかる 宝石大全」初版＆宝石小瓶 2点セット

“An Encyclopedia of Gems that Understand the Origin” & Sapphire 2 Stone Set《Purchased in Chanthaburi, Thailand》

Sold out 【売り切れ】カラッツオリジナル鑑別書用アルバム・ルース1個[ケン氏カットのレアストーン] - KARATZ STORE｜カラッツSTORE

[Final Sale] [Jeweler's Tools] Karatz Original Album Loose 1 Piece [KEN Cut 1 Stone]

Sold out Adult Sebon Star 2nd Edition Pendant Charmy Silver Model (SV925 & Gold Plated)

Adult Sebon Star 2nd Edition Pendant Charmy Silver Model (SV925 & Gold Plated)

coming soon [Available at 10:00 PM on December 10, 2025] Adult Sebon Star Adjuster Charm (Not available for individual purchase)

[Available at 10:00 PM on December 10, 2025] Adult Sebon Star Adjuster Charm (Not available for individual purchase) Sale price¥15,800
Sold out Let's try polishing gemstones with the "Do-it-yourself gemstone polishing kit" (for intermediate users: Andesine Labradorite from Madagascar)

Let's try polishing gemstones with the "Do-it-yourself gemstone polishing kit" (for intermediate users: Andesine Labradorite from Madagascar)

Sold out Let's try polishing gemstones with the "Do-it-yourself gemstone polishing kit" (for intermediate users: Illusion Sunstone)

Let's try polishing gemstones with the "Do-it-yourself gemstone polishing kit" (for intermediate users: Illusion Sunstone)
Sold out [On sale from 10 PM on Thursday, September 11th] TV anime "The Apothecary Diaries" x KARATZ collaboration Neko Neko model ring

[On sale from 10 PM on Thursday, September 11th] TV anime "The Apothecary Diaries" x KARATZ collaboration Neko Neko model ring

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.