Ka row

[Published as 22602712] [Colorful] Pt900 Grossular Garnet 1.31ct Diamond 0.24ct Ring with Appraisal Report Sale price¥128,000

【8/31 22時販売】【カラフリ】Pt900 カラーチェンジサファイア0.446ct ダイヤモンド0.12ctリング鑑別書 Sale price¥89,800

【8/30 22時販売】《限定15石》甲州貴石切子plusthreeローズクォーツ2石・フローラドロップカットを必ず含むローズクォーツガチャ（おまけで山本氏ローズクォーツ）《複数購入割引有》 Sale price¥2,980

【8/29 22時販売】ロシア産デマントイドガーネット（ホーステール認む） 2.7mm/0.093ctルース Sale price¥14,800

【8/29 22時販売】タンザニア産ミントガーネット 0.296ctルース Sale price¥8,800

【8/29 22時販売】ブラジル産ラベンダークォーツ（スコロライト） 0.475ctルース Sale price¥7,980

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.284ctルース

【#202607 Akihabara Pop-up, Currently Out of Stock】【12563254 Listed】Madagascar Bekily Blue Garnet (Color Change Garnet) 0.284ct Loose Sale price¥59,800

[Lottery Sale ②_202608_08] Unheated Color Change Sapphire from Sri Lanka 1.140ct Loose Stone GIA Sale price¥258,000

Grandidierite from Madagascar 0.264ct loose stone Sale price¥79,800

Brazilian copper rutilated quartz 1.262ct loose stone Sale price¥6,980

Brazilian copper rutilated quartz 1.647ct loose stone Sale price¥6,980

Brazilian copper rutilated quartz 1.352ct loose stone Sale price¥6,980

Synthetic Alexandrite 0.578ct loose stone Sale price¥9,800

Synthetic Alexandrite 0.841ct loose stone Sale price¥15,800

Pakistani Clinohumite 1.440ct Loose Stone, Japan-Germany Exchange Sale price¥39,800

【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 4.3mm/0.327ctルース Sale price¥18,800

【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 2.737ctルース Sale price¥45,800

[Published 12562277] Brazilian Marcasite in Quartz Loose Stone 4.188ct Sale price¥12,800

【Lottery Sale ②_202608_15】Tanzanian Chrome Tourmaline 2.271ct Loose Stone Sale price¥98,000

[Published on 22602652] [Colorful] K18 Synthetic Opal Pendant Top Sale price¥16,800

Pt900 マンダリンガーネット 1.15ct・ダイヤモンド0.11ctペンダントトップ（ネックレストップ）鑑別書

[22602704 Posted] [Colorful] Pt900 Mandarin Garnet 1.15ct Pendant Top Sale price¥110,000

Pt900合成アレキサンドライト0.41ct・ダイヤモンド0.54ctリング鑑別書

[Lottery Sale 0812_08] Pt900 Synthetic Alexandrite and 0.54ct Diamond Ring with Certificate Sale price¥128,000

【Sales start 8/24 10 PM JST】Brazilian Strawberry Quartz 5.9mm/0.830ct Loose Stone Sale price¥6,980

[On sale August 25th, 10 PM JST] Brazilian Rose Quartz 1.816ct Loose Gemstone Sale price¥12,800

Brazilian Rose Quartz Loose Stone 1.089ct [On Sale August 25th at 10 PM JST] Sale price¥14,800

[On sale August 25th at 10 PM] Brazilian Lavender Quartz (Scolite) 0.918ct Loose Gemstone Sale price¥9,800

[On sale August 27th at 10 PM JST] Russian Demantoid Garnet (Horsetail inclusion visible) 3.8mm/0.280ct Loose Sale price¥59,800

【Sales start: August 22nd, 10 PM JST】Tanzanian Mint Garnet 0.238ct Loose Stone Sale price¥12,800

[On sale August 22, 10 PM] Bi-Color Grossular Garnet from Kenya 0.278ct Loose Sale price¥12,800

【Sales start 8/22 10 PM JST】Bicolor Grossular Garnet from Kenya 0.906ct Loose Stone Sale price¥39,800

[Listed as 12563455] Tanzanian Bi-color Grossular Garnet 0.801 ct Loose Stone Sale price¥19,800

【12548939掲載】マダガスカル産ラズライトインクォーツ 1.600ctルース

Lazurite in quartz from Madagascar 7.5mm/1.600ct loose Sale price¥18,800

[Lottery Sale 0707_06] Kunzite from Afghanistan, 69.722ct Loose Stone Sale price¥258,000

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.459ctルース

[Lottery Sale 0707_08] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.459ct Loose Stone with Certificate Sale price¥69,800

[#202607 Akihabara Pop-up Store - Currently Removed] [Shinjuku Marui Annex 202605 - Currently Removed] [12559525 Listed] Synthetic Alexandrite 1.409ct Loose Stone Sale price¥39,800

【Sakura Shape】Synthetic Sapphire 8.8mm/3.631ct Loose Stone Sale price¥39,800

[On sale August 16 at 10 PM] Brazilian Spessartine Garnet 0.580ct Loose Stone with Certificate of Authenticity Sale price¥14,800

【On sale August 9th at 10 PM JST】Brazilian Spessartine Garnet, 0.580 ct Loose Stone, with Identification Report Sale price¥15,800

[On Sale August 19, 10 PM] Brazilian Spessartine Garnet 0.968 ct Loose Stone with Certificate Sale price¥25,800

Synthetic moissanite 1 stone loose (mint green, pear shape cut, 5 x 7 mm, moissanite)《Multiple purchase discount available》 Sale price¥3,980

Synthetic moissanite 1 stone loose (blue moissanite, 1.2mm)《Multiple purchase discount available》 Sale price¥1,000

1 Dragon Garnet (3.5mm, round cut) {Multiple purchase discounts available} Sale price¥3,980

Gem Gacha💎 Lepidolite in Quartz 1 stone《Multiple purchase discount available》 Sale price¥3,980

Brazilian rutilated quartz (rutile/rutile quartz (rutilated quartz)) 1 loose stone (6.0-6.5mm, for beginners) {Multiple purchase discounts available} Sale price¥2,580

Brazilian rutilated quartz (rutilated quartz) 1 loose stone (6mm) {Multiple purchase discounts available} Sale price¥1,500

Synthetic moissanite 1 stone loose (mint green, oval cut, 6 x 4 mm, moissanite)《Multiple purchase discount available》 Sale price¥3,980

ネパール産オーシャンブルーカイヤナイト＋ブルーカイヤナイト2石セット《複数購入割引有》

Limited to 20 sets: Nepalese Ocean Blue Kyanite + Blue Kyanite 2-stone set (Multiple purchase discounts available) Sale price¥3,980

Officially Licensed Product: Limited Quantity & Limited Time 15% Off (¥35,800 → ¥29,800) Yokohama DeNA BayStars Home Blue Ring - Double Type | SV925, Sea Blue Chalcedony, White Chalcedony Sale price¥29,800

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.