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Sold out [Available at 10 PM on January 24th] Limited to 18 stones: Golden Hill Turquoise from Kazakhstan (December birthstone, average 1.3 carats) [Multiple purchase discounts available]

[Available at 10 PM on January 24th] Limited to 18 stones: Golden Hill Turquoise from Kazakhstan (December birthstone, average 1.3 carats) [Multiple purchase discounts available]

Sold out ブラジル産パーティカラーパライバトルマリン 0.260ctルース

0.260ct Loose Parti-Color Paraiba Tourmaline from Brazil

Sold out Indian Alexandrite Cat's Eye 1.03ct Loose GIA

Indian Alexandrite Cat's Eye 1.03ct Loose GIA

Sold out 【12562747掲載】マダガスカル産非加熱ティールグリーンサファイア 1.740ctルース

Madagascar Unheated Teal Green Sapphire 1.74ct Loose GIA

Sold out 【12562749掲載】タンザニア産オレンジスピネル 0.273ctルース

Tanzanian Orange Spinel 3.9mm/0.273ct Loose Stone with Gemstone Report

Sold out 【12562750掲載】ミャンマー産レッドスピネル 0.257ctルース

Myanmar Red Spinel 3.7mm/0.257ct Loose Gemstone with Certificate

Sold out タンザニア産ホットピンクスピネル 0.204ctルース

[On sale May 2 at 10 PM] Tanzanian Hot Pink Spinel 0.204ct Loose Stone with Certificate
Sold out 中国・湖南省シンシャ（辰砂・シナバー） 0.635ctルース

[On sale May 1st at 10 PM JST] China Hunan Cinnabar (Synsha/Cinnabar) 0.635ct Loose Gemstone with Certificate

Sold out 中国・湖南省シンシャ（辰砂・シナバー） 0.982ctルース

[On sale May 1st at 10 PM] China Hunan Province Cinnabar Loose Stone 0.982ct with Certification

Sold out メキシコ産カンテラオパール 2.096ctルース

[On sale May 6, 10 PM JST] Mexican Cantera Opal Loose Stone, 2.096 ct
Sold out 【12562810掲載】メキシコ産カンテラオパール 8.097ctルース

Mexican Cantera Opal 8.097ct Loose
Sold out ピンクダイヤモンド 0.049ctルース(FANCY PINK, VS-1)

Pink Diamond 2.3mm/0.049ct Loose Stone (FANCY PINK, VS-1) Central Gem Lab

Sold out ピンクダイヤモンド 0.060ctルース(FANCY INTENSE PINK, VS-2)

Pink Diamond 0.060ct Loose (FANCY INTENSE PINK, VS-2) CBT

Sold out カメレオンダイヤモンド 0.153ctルース(LIGHT GRAY GREEN, SI-1)

Chameleon Diamond 0.153ct Loose (LIGHT GRAY GREEN, SI-1)
Sold out 【32501878掲載】グレーダイヤモンド 0.109ctルース(VERY LIGHT GRAY, SI-1)

Gray Diamond 3.0mm/0.109ct Loose (VERY LIGHT GRAY, SI-1)
Sold out "Limited to 9" Deep sea coral loose stone (March birthstone, coral, 7mm) "Multiple purchase discount available"

"Limited to 9" Deep sea coral loose stone (March birthstone, coral, 7mm) "Multiple purchase discount available"
Sold out 《Limited to 10 Gems》Koshu Kiseki Kiriko plusthree "Akatsuki" Ametrine Gem Gacha《Bulk Purchase Discount Available》

《Limited to 10 Gems》Koshu Kiseki Kiriko plusthree "Akatsuki" Ametrine Gem Gacha《Bulk Purchase Discount Available》
Sold out [On Sale April 18th, 10 PM JST] [Limited 9 Stones] Tosa Blood Coral Branch (Raw Coral) 1 Stone (March Birthstone, Coral, Average 7ct) [Bulk Purchase Discount Available]

[On Sale April 18th, 10 PM JST] [Limited 9 Stones] Tosa Blood Coral Branch (Raw Coral) 1 Stone (March Birthstone, Coral, Average 7ct) [Bulk Purchase Discount Available]
Sold out Midway coral branch (raw wood) 1 piece (March birthstone, coral, average 26ct, Midway coral) 《Multiple purchase discount available》

Midway coral branch (raw wood) 1 piece (March birthstone, coral, average 26ct, Midway coral) 《Multiple purchase discount available》
Sold out 【Sales start April 18th, 10 PM JST】《Limited to 5 pieces》Midway Atoll Coral Branch (Rough), 1 piece (March Birthstone, Coral, average 26ct)《Bulk purchase discount available》

【Sales start April 18th, 10 PM JST】《Limited to 5 pieces》Midway Atoll Coral Branch (Rough), 1 piece (March Birthstone, Coral, average 26ct)《Bulk purchase discount available》
Sold out Colombian mica in emerald 1.314ct loose

Colombian mica in emerald 1.314ct loose
Sold out 【12562820掲載】ブラジル産バイカラートルマリン 7.445ctルース

Brazilian bicolor tourmaline 7.445ct loose stone
Sold out 【12562823掲載】ブラジル産バイカラートルマリン 1.050ctルース

Brazilian bi-color tourmaline, 1.050 ct loose stone

Sold out 【12562824掲載】ミャンマー産マスグラバイト／ターフェアイト 15.472ctルース

Myanmar Musgravite/Taaffeite (symbiotic type) 15.472ct Loose with GIA & ZGCL

Sold out 【12562825掲載】ミャンマー産マスグラバイト／スピネル 8.005ctルース

8.005ct Loose Myanmar Masgravite/Spinel (Symbiotic Type) with Japan-German Gemmological Institute (GGTL) Certificate

Sold out 【12562829掲載】コロンビア産パイライト付ユークレース 23.430ct原石

Euclase with pyrite from Colombia 23.430ct Rough, Hōki Kyōso
Sold out 【12562579掲載】ナミビア産ジェレメジェバイト 0.355ctルース

Jeremejevite from Namibia 0.355ct Loose Stone with Certification
Sold out Lazulite from Pakistan 2.5mm/0.063ct Loose Gemstone with Certificate

Lazulite from Pakistan 2.5mm/0.063ct Loose Gemstone with Certificate
Sold out Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]

Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]
Sold out Synthetic Cobalt Spinel 0.466ct Loose

Synthetic Cobalt Spinel 0.466ct Loose
Sold out Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone

Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone
Sold out 【甲州貴石切子plusthree】モルダバイト 1.511ctルース ワッペン付

[Koshu precious stone Kiriko plusthree] Moldavite 1.511ct loose with patch
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） 0.922ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.922ct loose
Sold out Sky blue topaz 5.595ct loose

Sky blue topaz 5.595ct loose
Sold out レピドクロサイトインクォーツ 0.797ctルース

Lepidocrocite in quartz 0.797ct loose
Sold out パープルスピネル 0.520ctルース

Purple spinel 0.520ct loose
Sold out マダガスカル産オイルインクォーツ1石ルース（近年発見の新しい産地,平均28ct）《複数購入割引有》

[Limited to 7 stones] 1 loose oil-in-quartz stone from Madagascar (new locality discovered in recent years, average 28ct) [Multiple purchase discounts available]
Sold out オレゴンサンストーン 0.551ctルース

Oregon Sunstone 0.551ct loose
Sold out クリストバライトインクォーツ 1.660ctルース

Cristobalite in Quartz 1.660ct Loose
Sold out ラベンダークォーツ（スコロライト） 1.761ctルース

[Koshu Precious Stones Plusthree] Lavender Quartz (Scorolite) 1.761ct Loose Stone
Sold out フラワークォーツ 6.501ctルース

Brazilian Flower Quartz 6.501ct Loose Stone
Sold out アルマンディンガーネット 1.255ctルース

Almandine Garnet 1.255ct Loose Stone
Sold out Guatemalan Jade (with certificate, 3-3.5mm) - 1 Stone Loose - Limited to 10 Stones - Multiple Purchase Discount Available

Guatemalan Jade (with certificate, 3-3.5mm) - 1 Stone Loose - Limited to 10 Stones - Multiple Purchase Discount Available
Sold out 《Limited to 10 Gems》DGL certified, pink sapphire gacha including a 0.155ct Padparadscha sapphire, plus a bonus sapphire such as a trillion cut! 《Multi-purchase discount available》

《Limited to 10 Gems》DGL certified, pink sapphire gacha including a 0.155ct Padparadscha sapphire, plus a bonus sapphire such as a trillion cut! 《Multi-purchase discount available》
Sold out [On Sale 5/30 at 10 PM] "Limited 9 Stones" Blue Gem Gacha 💎 Brazilian Paraiba Tourmaline (CuO: 2.2%, MnO: 3.5%), Top Color Benitoite, Hauyne, Apatite (Multi-purchase discount available)

[On Sale 5/30 at 10 PM] "Limited 9 Stones" Blue Gem Gacha 💎 Brazilian Paraiba Tourmaline (CuO: 2.2%, MnO: 3.5%), Top Color Benitoite, Hauyne, Apatite (Multi-purchase discount available)
Sold out オレゴンサンストーン 0.390ctルース

Oregon sunstone 0.390ct loose
Sold out Brazilian Paraiba Tourmaline 0.216ct loose stone (CuO:1.2%, MnO:2.7%)

Brazilian Paraiba Tourmaline 0.216ct loose stone (CuO:1.2%, MnO:2.7%)
Sold out モザンビーク産パライバトルマリン 1.581ctルース

Paraiba tourmaline from Mozambique 1.581ct loose stone (CuO: 0.5%, MnO: 1.0%)

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.