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5 major gems

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コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.144ctルース

Colombian trapiche emerald (reverse trapiche) 0.144ct loose Sale price¥18,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.053ctルース

Colombian trapiche emerald (reverse trapiche) 0.053ct loose Sale price¥8,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.094ctルース

Colombian trapiche emerald (reverse trapiche) 0.094ct loose Sale price¥12,800
ウッドオパール 24.319ctルース

Wood opal 24.319ct loose Sale price¥59,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.170ctルース

Colombian trapiche emerald (reverse trapiche) 0.170ct loose Sale price¥15,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.188ctルース

Colombian trapiche emerald (reverse trapiche) 0.188ct loose Sale price¥18,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.093ctルース

Colombian trapiche emerald (reverse trapiche) 0.093ct loose Sale price¥9,800
ダイヤモンド 0.061ctルース（トラペーズカット,VSクラス相当）

Diamond 0.061ct loose (trapeze cut, VS class equivalent) Sale price¥9,800
ダイヤモンド 0.042ctルース（トラペーズカット,VSクラス相当）

Diamond 0.042ct loose (trapeze cut, VS class equivalent) Sale price¥8,800
ダイヤモンド 0.039ctルース（トラペーズカット,VSクラス相当）

Diamond 0.039ct loose (trapeze cut, equivalent to VS class) Sale price¥7,980
スリランカ産非加熱スターサファイア 2.094ctルース

Sri Lankan star sapphire 2.094ct loose Sale price¥16,800
Yellow sapphire from Madagascar 0.232ct loose

Yellow sapphire from Madagascar 0.232ct loose Sale price¥7,980
マダガスカル産イエローサファイア 0.207ctルース

Yellow sapphire from Madagascar 0.207ct loose Sale price¥7,980
マダガスカル産サファイア 0.205ctルース

Madagascar sapphire 0.205ct loose Sale price¥9,800
マダガスカル産グリーンサファイア 0.199ctルース

Green sapphire from Madagascar 0.199ct loose Sale price¥7,980
マダガスカル産イエローサファイア 0.181ctルース

Yellow sapphire from Madagascar 0.181ct loose Sale price¥5,980
マダガスカル産アイスブルーサファイア 0.181ctルース

Ice blue sapphire from Madagascar 0.181ct loose Sale price¥7,980
《有楽町202302持ち出し中》ルビー 0.194ctルース - カラッツSTORE

Ruby 0.194ct loose Sale price¥8,800
ルビー 0.472ctルース

[On sale at 10pm on September 22nd] Tanzanian Ruby 0.472ct Loose Sale price¥5,980
サファイア 3.813ctルース

Ice blue sapphire 3.813ct loose Sale price¥49,800
ゴールドシーンサファイア 2.3mm/0.083ctルース

Kenyan gold sheen sapphire 2.3mm/0.083ct loose Sale price¥8,800
ダイヤモンド 0.348ctルース(I, SI1)

Diamond 0.348ct loose (I, SI1) Sale price¥59,800
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
【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
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
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 【大人用】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」（初心者向け：バイカラーフローライト）・ボルダーオパール付※原石磨きコンテスト対象 ※

[For adults] Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: bicolor fluorite) with boulder opal *Subject to the rough stone polishing contest*

Sold out Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}

Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}
Sold out Gem Gacha💎 Cat Set (1 gemstone + 2 sapphires) {Multiple purchase discounts available}

Gem Gacha💎 Cat Set (1 gemstone + 2 sapphires) {Multiple purchase discounts available}

Sold out 「決定版 アンカットダイヤモンド」サイン入り初版本 ＆ダイヤモンド原石（グリーン蛍光）2点セット

"Definitive Uncut Diamond" by Kyoichi Suwa, signed first edition & 2-piece set of diamonds (hexagonal cut)

Sold out 含浸ルビー・天然ルビー見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] 2-piece set for distinguishing impregnated rubies and natural rubies (discount available for multiple purchases)

Sold out [Jeweler's Tools] {3 sets remaining} 3-piece set: Jewelry loupe (14x magnification), blue diamond, and pink tourmaline or sapphire

[Jeweler's Tools] {3 sets remaining} 3-piece set: Jewelry loupe (14x magnification), blue diamond, and pink tourmaline or sapphire
Sold out Pink Diamond Gacha! 💎 Fancy Light Pink Diamond 0.117ct (Certified) Includes One UV-Resistant Pink Diamond (Multiple Purchase Discounts Available)

Pink Diamond Gacha! 💎 Fancy Light Pink Diamond 0.117ct (Certified) Includes One UV-Resistant Pink Diamond (Multiple Purchase Discounts Available)

Sold out 【宝石商の道具】冷却ヒビ入れ染色クォーツ・天然エメラルド見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz/Natural Emerald Identification 2-piece Set (Discount available for multiple purchases)

Sold out 1 Ethiopian Opal (Baroque)《Discount available for multiple purchases》

1 Ethiopian Opal (Baroque)《Discount available for multiple purchases》

Sold out Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Sold out プリンセスカットダイヤモンド 2.0mm ルース（VSクラス相当）

Princess cut diamond 2.0mm loose (equivalent to VS class)《Multiple purchase discount available》

Sold out [On sale 10/26 at 10 PM] {3 stones left} Ruby Loose Gacha: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby {Multiple purchase discounts available}

[On sale 10/26 at 10 PM] {3 stones left} Ruby Loose Gacha: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby {Multiple purchase discounts available}
Sold out Limited to 10 stones: Sri Lankan star sapphire, loose stone (multiple purchase discounts available)

Limited to 10 stones: Sri Lankan star sapphire, loose stone (multiple purchase discounts available)
Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm,ピンクサファイア）《複数購入割引有》

Greenland Ice Ruby 1 stone (heart shape, 4mm, pink sapphire) {Multiple purchase discount available}

Sold out 1 loose sapphire from Ratnapura, Sri Lanka (3.0mm-4.0mm, trilliant cut)《Multiple purchase discount available》

1 loose sapphire from Ratnapura, Sri Lanka (3.0mm-4.0mm, trilliant cut)《Multiple purchase discount available》

Sold out Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available

Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available
Sold out 《残り4石》ジェムガチャ💎ジンバブエ産ソーヤブルダイヤモンド1石（正八面体,VS~SIクラス相当） - カラッツSTORE

Gem Gacha💎1 Zimbabwe sawable diamond (regular octahedron, VS~SI class equivalent)

Sold out グリーンランド産ルビー 1石（ラウンドカット,2mm）

1 Ruby from Greenland (round cut, 2mm) with certificate

Sold out [On sale September 14th at 10 PM] {Only one left} Blue Sapphire Gacha includes two unheated royal blue sapphires (with AIGS certificate) (plus one Teppanawa Mine sapphire) {Multiple purchase discounts available}

[On sale September 14th at 10 PM] {Only one left} Blue Sapphire Gacha includes two unheated royal blue sapphires (with AIGS certificate) (plus one Teppanawa Mine sapphire) {Multiple purchase discounts available}
Sold out [Available at 10 PM on September 7th] Limited Quantity Gem Gacha 💎 Win 1 or 2 gems, including pink diamonds and 46ct cantera opals. Discounts available for multiple purchases.

[Available at 10 PM on September 7th] Limited Quantity Gem Gacha 💎 Win 1 or 2 gems, including pink diamonds and 46ct cantera opals. Discounts available for multiple purchases.
Sold out [Available at 10 PM on 10/11] [Limited to 15 stones] Blue Stone Gacha (Top Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) [Multiple Purchase Discounts Available]

[Available at 10 PM on 10/11] [Limited to 15 stones] Blue Stone Gacha (Top Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) [Multiple Purchase Discounts Available]
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)

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.