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Sold out 【甲州貴石切子】コロンビア産エメラルド 2.472ct《コラボ》ルース（チェッカーボード×昴） ワッペン付

《Withdrawn in May》 [Koshu Precious Stone Kiriko] Emerald from Colombia 2.472ct 《Collaboration》 Loose (Checkerboard x Subaru) Patch included

Sold out 【12539489掲載】カラーシフトアメジスト 5.190ctルース

#May2026Campaign #May2026Gacha [Listed as 12539489] Color-shifting Amethyst 5.190ct Loose Gemstone

Sold out 【甲州貴石切子】コロンビア産エメラルド 2.550ct《コラボ》ルース ワッペン付

[Withdrawn in May] [Koshu Precious Stone Kiriko] Emerald from Colombia 2.550ct [Collaboration] Loose with patch May CPCP

Sold out Gem gacha cut by Shimizu Kiseki and Yoichi Fukazawa 💎 {Multiple purchase discounts available} {Halloween specials included}

Gem gacha cut by Shimizu Kiseki and Yoichi Fukazawa 💎 {Multiple purchase discounts available} {Halloween specials included}

Sold out マダガスカル産スフェーン 0.935ctルース

[Dandelion Cut] Madagascar Sphene 6.0mm/0.935ct Loose Stone

Sold out スペイン産アンダリュサイト 0.835ctルース

Dandelion Cut Andalusite from Spain, 6.0mm/0.835ct Loose Stone

Sold out 【甲州貴石切子plusthree】ロッククリスタル 15.588ct《切子玉》ルース ワッペン付

[Koshu Precious Stone Kiriko PlusThree] Rock Crystal 15.588ct《Kirikodama》 Loose with Patch

Sold out 【カメリアカット】レモンクォーツ8mmルース 直筆サイン付&ワッペン付 - カラッツSTORE

[Camellia cut] Lemon quartz 8mm loose with autograph and emblem

Sold out [Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Necklace

[Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Necklace

Sold out [Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone

[Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone
Sold out 【Sakura Shape】Oregon Sunstone 1.174ct Loose

【Sakura Shape】Oregon Sunstone 1.174ct Loose
Sold out 【ゆきんこカット】合成サファイア 2.220ctルース（合成ブルーサファイア）

[Yukinko Cut] Synthetic Sapphire 2.220ct Loose (Synthetic Blue Sapphire)
Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose

[Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose
Sold out [Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

[Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

Sold out [Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

[Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone

[Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone

Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 2.420ct Loose Stone

[Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 2.420ct Loose Stone

Sold out 【Yukinko Cut】 Siberian Blue Quartz (Synthetic Quartz) 2.503ct Loose

【Yukinko Cut】 Siberian Blue Quartz (Synthetic Quartz) 2.503ct Loose

Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose

[Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose
Sold out [Koshu Precious Stones plusthree] Brazilian Garden Quartz 47.809ct Loose

[Koshu Precious Stones plusthree] Brazilian Garden Quartz 47.809ct Loose

Sold out [Koshu Precious Stones plusthree] Spanish Sphalerite 6.417ct Loose Stone

[Koshu Precious Stones plusthree] Spanish Sphalerite 6.417ct Loose Stone

Sold out [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone

[Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
Sold out ブラジル産トラピッチェアメジスト 24.772ctルース

Brazilian Trapichea Amethyst 24.772ct loose with patch
Sold out [Sakura In-Cut] Tibetan Andesine 8.0mm/1.366ct Loose Stone

[Sakura In-Cut] Tibetan Andesine 8.0mm/1.366ct Loose Stone

Sold out [Sakura In-Cut] Tibetan Andesine 6.0mm/0.631ct Loose Stone

[Sakura In-Cut] Tibetan Andesine 6.0mm/0.631ct Loose Stone

Sold out [Dandelion Cut] Madagascar Sphene 0.950ct Loose Stone

[Dandelion Cut] Madagascar Sphene 0.950ct Loose Stone

Sold out [Dandelion Cut] Madagascar Sphene 6.0mm/0.775ct Loose Stone

[Dandelion Cut] Madagascar Sphene 6.0mm/0.775ct Loose Stone

Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.685ct Loose

[Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.685ct Loose
Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.201ct Loose

[Sakura Shape] Oregon Sunstone from the United States, 1.201ct Loose

Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.104ct Loose

[Sakura Shape] Oregon Sunstone from the United States, 1.104ct Loose

Sold out [Sakura In-Cut] Mali Garnet (Grossular/Andradite Garnet) from the Republic of Mali, 6.0mm/0.920ct Loose Stone with Certificate of Authenticity

[Sakura In-Cut] Mali Garnet (Grossular/Andradite Garnet) from the Republic of Mali, 6.0mm/0.920ct Loose Stone with Certificate of Authenticity

Sold out 【さくらインカット】マダガスカル産アパタイト 7.9mm/1.537ct《コラボ》ルース ワッペン

[Sakura In-Cut] Madagascar Green Apatite 7.9mm/1.537ct "Collaboration" Loose Stone Patch
Sold out 【甲州貴石切子plusthree】パイライトインクォーツ 12.164ctルース ワッペン付

[Koshu precious stone Kiriko plusthree] Pyrite in quartz 12.164ct loose with patch
Sold out 【甲州貴石切子】モルガナイト 14.931ct《コラボ》ルース ワッペン付

[Koshu Precious Stone Kiriko] Morganite 14.931ct《Collaboration》Loose with emblem
Sold out 【ゆきんこカット】YAG（イットリウムアルミニウムガーネット） 1.391ctルース 鑑別書

[Yukinko Cut] YAG (Yttrium Aluminum Garnet) 1.391ct Loose Stone with Certificate of Authenticity
Sold out [Koshu Precious Stones plusthree] "Cut Rose Quartz" 13.682ct Loose Stone

[Koshu Precious Stones plusthree] "Cut Rose Quartz" 13.682ct Loose Stone

Sold out 北海道産UVオパール 12.259ctルース ワッペン付

UV opal from Hokkaido 12.259ct loose with patch
Sold out 【さくらインカット】メキシコ産オパール 9mm/1.532ctルース - カラッツSTORE

[Sakura In-Cut] Mexican Opal 9mm/1.532ct Loose
Sold out 【甲州貴石切子】ティンカーベルクォーツ（ピンクファイヤークォーツ） 3.519ctルース ワッペン付

[Koshu Precious Stone Kiriko] Tinker Bell Quartz (Pink Fire Quartz) 3.519ct loose with patch
Sold out 【深澤氏スモーキーきのこ】スモーキークォーツ 20.250ctルース ワッペン付

[Mr. Fukasawa Smoky Mushroom] Smoky Quartz 20.250ct loose with patch
Sold out 【深澤氏ルチルきのこ】ルチルレイテッドクォーツ 29.180ctルース ワッペン付

[Mr. Fukazawa's Rutile Mushroom] Rutile Quartz (Rutile-Rated Quartz) 29.180ct Loose Stone with Patch
Sold out タンザニア産タンザナイト 0.780ctルース

[Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.780ct Loose
Sold out シベリアンブルークォーツ（合成クォーツ） 1.067ctルース

[Sakura Ingot Cut] Siberian Blue Quartz (Synthetic Quartz) 1.067 ct Loose Stone

Sold out 【 ダンデライオンカット】ロンドンブルートパーズ 6.750ctルース - カラッツSTORE

[Dandelion Cut] London Blue Topaz 6.750ct Loose with Patch

Sold out 【12525674掲載】アメトリン 9.740ctルース

[Sakura Incut] Ametrine 9.740ct loose with patch

Sold out パープルサファイア 0.943ctルース

[Sakura In-Cut] Madagascar Purple Sapphire 6.0mm/0.943ct Loose Stone

Sold out ブラジル産グリーントルマリン 0.734ctルース

[Clover-in-cut] Brazilian green tourmaline 6.0mm/0.734ct loose stone

Sold out 【さくらインカット】レモンクォーツ 20mm/21.540ct《コラボ》ルース ワッペン付 - カラッツSTORE

[Sakura Incut] Lemon Quartz 20mm/21.540ct《Collaboration》Loose with emblem

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.