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Sold out 中国産シンシャ（辰砂・シナバー） 1.035ctルース

Chinese Cinnabar (Cinnabar) 1.035ct Loose Stone
Sold out 中国産辰砂（シンシャ・シナバー）0.884ctルース（ファセットカット） 鑑別書

Chinese Cinnabar (Xinsha/Cinnabar) 0.884ct Loose Stone (Faceted) with Certificate of Authenticity
Sold out Chinese Cinnabar (Cinnabar) 0.811ct Loose Stone with Certificate of Authenticity

Chinese Cinnabar (Cinnabar) 0.811ct Loose Stone with Certificate of Authenticity
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.064ctルース

Russian Demantoid Garnet (Horsetail) 0.064ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.061ctルース

Russian Demantoid Garnet (Horsetail) 0.061ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.036ctルース

Russian Demantoid Garnet (Horsetail) 0.036ct Loose Stone
Sold out ドミニカ共和国産ラリマー 2.568ctルース

2.568ct loose Larimar from the Dominican Republic
Sold out Tanzanian Malaya Garnet 0.569ct Loose Stone

Tanzanian Malaya Garnet 0.569ct Loose Stone
Sold out Limited Edition of 10 Bicolor Gacha! 💎 Includes two Zimbabwean euclase stones (average 0.088ct), a 1.03ct bicolor sapphire, a bicolor chrysoberyl, and more. Discounts available for multiple purchases.

Limited Edition of 10 Bicolor Gacha! 💎 Includes two Zimbabwean euclase stones (average 0.088ct), a 1.03ct bicolor sapphire, a bicolor chrysoberyl, and more. Discounts available for multiple purchases.
Sold out Limited Edition of 11 Rare Stones! 💎 Two 0.23ct Paraiba Tourmalines from Batalha, Brazil, a Pink Diamond, and a Benitoite Loose Stone. Discounts available for multiple purchases.

Limited Edition of 11 Rare Stones! 💎 Two 0.23ct Paraiba Tourmalines from Batalha, Brazil, a Pink Diamond, and a Benitoite Loose Stone. Discounts available for multiple purchases.
Sold out One loose, oil-free emerald from Russia (2.8mm, round cut) (Multiple purchase discounts available)

One loose, oil-free emerald from Russia (2.8mm, round cut) (Multiple purchase discounts available)
Sold out Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]

Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]
Sold out Pt900 Ice Blue Diamond 0.333ct 0.333ct Akoya Pearl 8.0mm Earrings

Pt900 Ice Blue Diamond 0.333ct 0.333ct Akoya Pearl 8.0mm Earrings
Sold out Fancy Intense Purple Pink Diamond 0.021ct Loose (FANCY INTENSE PURPLE PINK, SI2)

Fancy Intense Purple Pink Diamond 0.021ct Loose (FANCY INTENSE PURPLE PINK, SI2)
Sold out Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)

Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)
Sold out Brazilian Dendritic Quartz Kitten Cut Loose Stone (For Beginners) (5mm) (Multiple Purchase Discounts Available)

Brazilian Dendritic Quartz Kitten Cut Loose Stone (For Beginners) (5mm) (Multiple Purchase Discounts Available)
Sold out K18YG マダガスカル産スフェーン 0.597ct ペンダントトップ（ネックレストップ）

18K Yellow Gold Madagascar Sphene 0.597ct Pendant (Necklace)
Sold out ブラジル産レインボーアクアマリン 2.698ctルース

Brazilian Rainbow Aquamarine (Iridescent Aquamarine) 2.698ct Loose Stone
Sold out インターナリーダイヤモンド 0.25ルース(E, IF, 3Excellent) GIA

Internal Diamond 4.1mm/0.250ct Loose (F, IF, 3 Excellent) GIA
Sold out K18YG ミャンマー産翡翠（ヒスイ） 0.434ct・エメラルドリング

18K Yellow Gold Myanmar Jadeite and Emerald 0.434ct Ring
Sold out Limited to 15 stones: Blue Stone Gacha (Top-Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) (Multiple purchase discounts available)

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 パラサイティックペリドット 0.292ctルース

Parasitic Peridot 0.292ct Loose Stone
Sold out Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate

Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate
Sold out Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.131ct Loose Stone

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.131ct Loose Stone
Sold out タンザニア産ペリステライト 0.503ctルース

Tanzanian Peristerite 5.1mm/0.503ct Loose Stone (Rose Cut)
Sold out タンザニア産ペリステライト 0.458ctルース

Tanzanian Peristerite 5.1mm/0.458ct Loose Stone (Rose Cut)
Sold out スペイン産バイカラースファレライト 0.727ctルース

0.727ct Bicolor Sphalerite Loose Stone from Spain
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.577ctルース

Rainbow Garnet (Andradite Garnet) 0.577ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.439ctルース

Rainbow Garnet (Andradite Garnet) 0.439ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out ブラジル産ゴーシェナイト 1.611ctルース

Brazilian Goshenite 1.611ct loose stone
Sold out パパラチアサファイア 0.251ctルース

Padparadscha Sapphire 0.251ct Loose Stone
Sold out パパラチアサファイア 0.376ctルース

Padparadscha Sapphire 0.376ct Loose Stone
Sold out バイカラーゾイサイト 0.703ctルース

Tanzanian Bicolor Zoisite 5.5mm/0.703ct Loose Stone
Sold out バイカラーゾイサイト 0.745ctルース

Tanzanian Bicolor Zoisite 5.5mm/0.745ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.075ctルース

Russian Demantoid Garnet (Horsetail) 2.5mm/0.075ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 2.5mm/0.073ctルース

Russian Demantoid Garnet (Horsetail) 2.5mm/0.073ct Loose Stone
Sold out ロシア産アレキサンドライト 0.088ctルース

Russian Alexandrite 0.088ct loose stone
Sold out ロシア産アレキサンドライト 0.058ctルース

Russian Alexandrite 0.058ct loose stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.128ctルース

Russian Demantoid Garnet (Horsetail) 3.1mm/0.128ct Loose Stone
Sold out グリーンランド産ルビー 0.220ctルース

Greenland Ruby 3.6mm/0.220ct Loose Stone with Certificate
Sold out グリーンランド産ルビー 0.134ctルース

Greenland Ruby 3.0mm/0.134ct Loose Stone with Certificate
Sold out インド産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.450ctルース

Indian Andesine Labradorite (also known as Rainbow Moonstone) 0.450ct Loose Stone
Sold out 【12551738掲載】翡翠（ヒスイ） 69.859ctルース

[12551738] Jadeite 69.859ct loose stone
Sold out トリプライト 0.322ctルース

[12551639] Triplite 0.322ct loose stone
Sold out [Posted in 12549810] Benitoite 0.607ct loose

[Posted in 12549810] Benitoite 0.607ct loose
Sold out ゴーシェナイト 1.080ctルース

[12549595 published] Goshenite 1.080ct loose
Sold out 【12548919掲載】非加熱バイカラーサファイア 2.600ctルース

[12548919 published] Unheated bicolor sapphire 2.600ct loose
Sold out ガーネット 0.979ctルース

[Posted in 12548908] Garnet 0.979ct loose

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.