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Sold out ブルージルコン 0.267ctルース

Cambodian blue zircon 0.267ct loose

Sold out コロンビア産エメラルド 2.018ctルース

[Koshu precious stone cutter pluethree] Colombian emerald 2.018ct loose
Sold out エメラルド 2.498ctルース

[Clover in cut] Emerald 9mm/2.498ct {Collaboration} Loose with patch
Sold out オーストラリア産レインボーラティスサンストーン 0.353ctルース

Australian rainbow lattice sunstone 0.353ct loose
Sold out Blue Garnite from Nigeria 0.514ct Ruth Japanese-German Edition

Blue Garnite from Nigeria 0.514ct Ruth Japanese-German Edition
Sold out Gray Diamond 0.200ct Loose (FANCY DARK GRAY, SI-2)

Gray Diamond 0.200ct Loose (FANCY DARK GRAY, SI-2)
Sold out 【32501858掲載】グレーダイヤモンド 0.141ctルース(FANCY GRAY, I-1)

Loose Gray Diamond 0.141ct (FANCY GRAY, I-1)
coming soon ピンクサファリン 0.239ctルース

0.239ct Loose Pink Sapphire from Madagascar, Japan/Germany Sale price¥49,800
coming soon Bulgarian Sphalerite 5.8mm/1.058ct Loose Stone

Bulgarian Sphalerite 5.8mm/1.058ct Loose Stone Sale price¥39,800
Sold out マダガスカル産イエローサファイア 0.268ctルース

Yellow Zircon 0.268ct Loose

Sold out デュモルチェライトインクォーツ 0.495ctルース

Brazilian Dumortierite in Quartz 0.495ct loose stone

Sold out 【さくらインカット】モンゴル産アンデシン 8.0mm/1.652ctルース

[Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Loose Stone

Sold out ブラジル産パライバトルマリン 0.49ctルース - KARATZ STORE｜カラッツSTORE

0.49ct loose Brazilian Paraiba Tourmaline (CuO:0.6%, Mn:0.1%)

coming soon [Posted on 12562717] Greenland Sapphire 1.258 ct Loose

[Posted on 12562717] Greenland Sapphire 1.258 ct Loose Sale price¥79,800
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 【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 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 アルマンディンガーネット 1.255ctルース

Almandine Garnet 1.255ct Loose Stone
coming soon 【12562864掲載】コロンビア産トラピッチェエメラルド 4.185ctルース

[Listed as 12562864] Colombian Trapiche Emerald, 4.185ct Loose Gemstone Sale price¥158,000
Sold out Lottery Sale 12 [Exclusive to Winners] [Listing 12562853] Bolivian Phosphophyllite 0.448ct Loose Stone with Certification

Lottery Sale 12 [Exclusive to Winners] [Listing 12562853] Bolivian Phosphophyllite 0.448ct Loose Stone with Certification

coming soon Flawless Diamond (H&C) 0.280ct Loose Stone (D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 0.280ct Loose Stone (D, FL, 3Excellent H&C) Sale price¥210,000
coming soon Flawless Diamond (H&C) 0.290ct Loose (D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 0.290ct Loose (D, FL, 3Excellent H&C) Sale price¥218,000
coming soon 【12563029掲載】ブラジル産グリーントルマリン 1.319ctルース

[Listed in 12563029] Nigerian mint green tourmaline 1.319ct loose stone Sale price¥69,800
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 スリランカ産ピンクスターサファイア 1.682ctルース

[On sale May 15, 10 PM JST] Sri Lankan Pink Star Sapphire, 1.682ct loose stone
coming soon 【12562959掲載】スリランカ産サファイアキャッツアイ 2.442ctルース

[Lottery Sale 0521_06] Sri Lankan Sapphire Cat's Eye Loose Stone 2.442ct Sale price¥75,800
coming soon [Listed as 12562936] Andalusite from Spain, 0.536 ct loose stone

[Listed as 12562936] Andalusite from Spain, 0.536 ct loose stone Sale price¥9,800
coming soon [12562937 listed] Andalusite from Spain 0.571ct Loose Gemstone

[12562937 listed] Andalusite from Spain 0.571ct Loose Gemstone Sale price¥7,980
coming soon [Published on 12562938] Andalusite from Spain 0.582ct Loose

[Published on 12562938] Andalusite from Spain 0.582ct Loose Sale price¥7,980
coming soon [Listed as 12562939] Andalusite from Spain 0.930ct Loose Stone

[Listed as 12562939] Andalusite from Spain 0.930ct Loose Stone Sale price¥12,800
coming soon Internally Flawless Diamond 0.217ct Loose (D, IF, 3Excellent H&C)

Internally Flawless Diamond 0.217ct Loose (D, IF, 3Excellent H&C) Sale price¥98,000
coming soon Internally Flawless Diamond 0.272ct Loose (D, IF, 3Excellent H&C)

Internally Flawless Diamond 0.272ct Loose (D, IF, 3Excellent H&C) Sale price¥148,000
Sold out ゴーシェナイト 1.040ctルース

Goshenite 1.040ct loose
coming soon 【12563048掲載】パキスタン産カイヤナイト 0.764ctルース

[Listed under 12563048] Pakistan Kyanite 0.764ct Loose Sale price¥6,980
coming soon 【12563049掲載】オーストラリア産ボルダーオパール 12.216ctルース

[12563049 listed] Australian Boulder Opal 12.216ct Loose Gemstone Sale price¥15,800
coming soon 【12563050掲載】オーストラリア産ボルダーオパール 41.775ctルース

[Listing 12563050] Australian Boulder Opal 41.775ct Loose Stone Sale price¥19,800
coming soon [On sale May 24th at 10 PM] "Limited to 12 Stones" Blue Gemstone Gacha 💎 Brazil Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) and Zimbabwe Euclase, normally priced at ¥35,800, and more! (Multiple purchase discount available)

[On sale May 24th at 10 PM] "Limited to 12 Stones" Blue Gemstone Gacha 💎 Brazil Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) and Zimbabwe Euclase, normally priced at ¥35,800, and more! (Multiple purchase discount available) Sale price¥3,980
coming soon 【抽選販売0531_15】マダガスカル産バイカラースフェーン 3.998ctルース

【抽選販売0531_15】マダガスカル産バイカラースフェーン 3.998ctルース Sale price¥178,000
【6/5 22時販売】コロンビア産ユークレース 2.365ctルース

【6/5 22時販売】コロンビア産ユークレース 2.365ctルース Sale price¥59,800
Sold out ルビー 0.187ctルース

【15/27 22時販売】モザンビーク産ルビー 0.187ctルース 鑑別書

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.