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Sold out GGG（ガドリウムガリウムガーネット） 0.658ctルース

[For sale May 13 at 10 PM] GGG (Gadolinium Gallium Garnet) 4.0mm/0.658ct Loose Stone
Sold out ティールブルーサファイア 0.275ctルース

[Sale on May 12th at 10 PM] Teal Blue Sapphire 0.275 ct Loose Stone
Sold out [Sales start May 15, 10 PM] Limited to 11 Stones: Aquamarine Gacha with Certified Santa Maria Aquamarine (Multiple Purchase Discount Available)

[Sales start May 15, 10 PM] Limited to 11 Stones: Aquamarine Gacha with Certified Santa Maria Aquamarine (Multiple Purchase Discount Available)
Sold out [On sale May 16th at 10 PM JST] 《Limited 20 stones》Big Gem Gacha 💎 Win a 19ct up Shimizu Kisaki Co. Camellia cut gem 《Multiple purchase discount available》

[On sale May 16th at 10 PM JST] 《Limited 20 stones》Big Gem Gacha 💎 Win a 19ct up Shimizu Kisaki Co. Camellia cut gem 《Multiple purchase discount available》
Sold out [On sale May 16th at 10 PM JST] Limited to 10 stones! Cat Cut Gacha 💎 Tourmaline, Opal, Chalcedony, etc. (Includes a bonus mini-mini cat cut stone) (Multiple purchase discount available)

[On sale May 16th at 10 PM JST] Limited to 10 stones! Cat Cut Gacha 💎 Tourmaline, Opal, Chalcedony, etc. (Includes a bonus mini-mini cat cut stone) (Multiple purchase discount available)
Sold out [On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available]

[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available]
Sold out 【Sales start 10 PM, May 17th】《Limited 12 Gems》Win a Shimizu Kiseki Sakura In-cut Diamond! 💎 Tourmaline Gacha (plus a bonus Sanje Tourmaline)《Multiple Purchase Discount Available》

【Sales start 10 PM, May 17th】《Limited 12 Gems》Win a Shimizu Kiseki Sakura In-cut Diamond! 💎 Tourmaline Gacha (plus a bonus Sanje Tourmaline)《Multiple Purchase Discount Available》
Sold out [On sale May 10th, 10 PM JST] 《Limited 4 Stones》Madagascar Pezzottaite Loose Stone (Round Cut, approx. 3mm) cut by Mr. Sanje 《Multi-purchase discount available》

[On sale May 10th, 10 PM JST] 《Limited 4 Stones》Madagascar Pezzottaite Loose Stone (Round Cut, approx. 3mm) cut by Mr. Sanje 《Multi-purchase discount available》
Sold out Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan

Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan
Sold out [On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"

[On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"
Sold out ダイヤモンド 0.141ctルース(E, VVS-2, EXCELLENT)

[Posted in 32501164] Diamond 0.141ct loose (E, VVS-2, EXCELLENT)
Sold out アフガニスタン産ラピスラズリ 3.279ctルース

[On Sale May 10th at 10 PM] Afghanistan Lapis Lazuli 9.7mm / 3.279ct Rose Cut Loose Stone
Sold out アフガニスタン産ラピスラズリ 1.103ctルース

【Sales start May 10th, 10 PM JST】Afghanistan Lapis Lazuli 1.103ct Loose Stone
Sold out マダガスカル産アイオライトサンストーン 0.388ctルース

[On Sale May 10th, 10 PM] Madagascar Iolite Sunstone 0.388ct Loose Gemstone
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） 1.374ctルース

[For sale May 23, 10 PM JST] Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 6.7mm/1.374ct Loose Stone
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） 0.656ctルース

【Sale from 10 PM on May 23】Nara Prefecture Tenkawa Village Rainbow Garnet (Andradite Garnet) 4.8mm/0.656ct Loose Stone
Sold out ダイアスポア 0.757ctルース

[Sale on May 9th at 10 PM] Turkish Diaspore 0.757ct Loose Stone
Sold out トルコ産カラーチェンジダイアスポア 0.339ctルース

【Sale starts 10PM on May 9th】Turkish Color Change Diaspore 0.339ct Loose
Sold out Pt950 アウイナイト 0.24ct・ダイヤモンド0.18ctリング 鑑別カード

[Available 5/18 10PM] [Colorful] Pt950 Hauyne 0.24ct / Diamond 0.18ct Ring with Certificate
Sold out Pt900 ダイヤモンド 0.50ct リング

[Sales begin May 18 at 10 PM JST] [Colorflee] Pt900 Diamond 0.50ct Ring
Sold out ナイジェリア産コバルトガーナイト 0.346ctルース 鑑別書

[Sales begin 5/6 10 PM JST] Nigerian Cobalt Garnet 0.346ct Loose Stone with Gemstone Identification Report
Sold out [Sales start 10:00 PM on May 4th] Colombian non-oil emerald (NONE) 0.060ct loose GIA

[Sales start 10:00 PM on May 4th] Colombian non-oil emerald (NONE) 0.060ct loose GIA
Sold out スリランカ産ヘソナイトガーネット 1.968ctルース

[On Sale May 2nd, 10 PM JST] Sri Lankan Hessonite Garnet 1.968ct Loose Stone
Sold out Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)

Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)
Sold out [On sale May 3rd at 10 PM] Limited to 9 stones! Color-shifting amethyst gacha, including a 3.49ct konpeito cut by Makoto Nakano (normally 22,800 yen) and a Sanje-cut stone. (Multiple purchase discount available)

[On sale May 3rd at 10 PM] Limited to 9 stones! Color-shifting amethyst gacha, including a 3.49ct konpeito cut by Makoto Nakano (normally 22,800 yen) and a Sanje-cut stone. (Multiple purchase discount available)
Sold out [Sales Start: May 5th, 10 PM JST] Limited 12 Stones - Alexandrite Gacha with Alexandrites from Different Origins, including Russian Alexandrite (normally 69,800 JPY), plus a bonus Sri Lankan Chrysoberyl crystal. Multiple purchase discount available.

[Sales Start: May 5th, 10 PM JST] Limited 12 Stones - Alexandrite Gacha with Alexandrites from Different Origins, including Russian Alexandrite (normally 69,800 JPY), plus a bonus Sri Lankan Chrysoberyl crystal. Multiple purchase discount available.
Sold out [On sale May 3rd, 10 PM JST] Garnet Gacha (Round Cut, 2.5mm) Cut by American lapidary artist KEN 《Bulk purchase discount available》

[On sale May 3rd, 10 PM JST] Garnet Gacha (Round Cut, 2.5mm) Cut by American lapidary artist KEN 《Bulk purchase discount available》

[Option] Milling Sale price¥8,800
Sold out Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)

Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)
Sold out 【32501905掲載】ブルーダイヤモンド（トリートメント） 0.801ctルース(FANCY INTENSE GREEN BLUE, SI-2)

Sky Blue Diamond (Treated) 0.801ct Loose Stone (FANCY INTENSE GREEN BLUE, SI-2) Certificate

Sold out マダガスカル産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 1.003ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.003ct loose stone
Sold out ブラジル産パライバトルマリン 0.177ctルース

Brazilian Paraiba Tourmaline 0.177ct loose stone (CuO: 2.1%, MnO: 1.3%)
Sold out Colombian emerald 0.153ct rough stone

Colombian emerald 0.153ct rough stone
Sold out 【22602567掲載】K18 シトリン リング

[On sale May 2nd at 10 PM] K18 Citrine Chain Ring
Sold out 【22602565掲載】K18 ブルーサファイア リング

[On sale May 2nd at 10 PM] K18 Blue Sapphire Ring
Sold out 【22602564掲載】K18 タンザナイト リング

[Sales start May 2, 10 PM] K18 Tanzanite Chain Ring
Sold out 【22602563掲載】K18 アルマンディンガーネット リング

[Sales begin May 2nd, 10 PM JST] K18 Almandine Garnet Chain Ring
Sold out 【12562845掲載】スファレライト 7.286ctルース

Spanish Sphalerite 11mm/7.286ct loose stone
Sold out 【12562843掲載】コーネルピン 0.700ctルース

Tanzanian Kornerupine 0.700ct Loose Stone
Sold out [Shipping and public settings notice] Bracelet processing fee for Mochizuki template [For Mr.]

[Shipping and public settings notice] Bracelet processing fee for Mochizuki template [For Mr.]

Sold out インターナリーフローレスダイヤモンド（H&C） 0.300ctルース(D, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.3mm/0.300ct Loose (D, IF, 3Excellent H&C) GIA&CGL

Sold out ダイヤモンド（H&C） 0.200ctルース(D, VVS-2, 3Excellent H&C)

Diamond (H&C) 3.8mm/0.200ct Loose (D, VVS-2, 3Excellent H&C) CBT

Sold out ダイヤモンド 0.310ctルース(E, VS1, 3Excellent)

Diamond 4.3mm/0.310ct Loose (E, VS1, 3Excellent) GIA

Sold out ダイヤモンド 3.0mm/0.101ctルース(D, VVS-2, VeryGood)

Diamond 3.0mm/0.101ct Loose Stone (D, VVS-2, VeryGood)

Sold out ダイヤモンド 0.095ctルース(F, VS-2, Excellent)

Diamond 3.0mm/0.095ct Loose (F, VS-2, Excellent)

Sold out 【32501889掲載】ダイヤモンド（H&C） 0.194ctルース(G, VVS-1, 3Excellent H&C)

Diamond (H&C) 3.7mm/0.194ct Loose (G, VVS-1, 3Excellent H&C)

Sold out フローレスダイヤモンド（H&C） 0.230ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 4.0mm/0.230ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Laboratory

Sold out 【32501881掲載】インターナリーフローレスダイヤモンド（H&C） 0.340ctルース(F, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.5mm/0.340ct Loose (F, IF, 3Excellent H&C) GIA & CBT

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.