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Sold out 【桔梗カット】ロッククリスタル 15.750ctルース《シミズ貴石代表・清水幸雄氏》 ワッペン付

[Kikyo Cut] Rock Crystal 15.750ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

Sold out 【桔梗カット】ロッククリスタル 19.590ctルース《シミズ貴石代表・清水幸雄氏》 ワッペン付

[Kikyo Cut] Rock Crystal 19.590ct Loose (Mr. Yukio Shimizu, Representative of Shimizu Precious Stones) Patch Included

Sold out グリーンクォーツ 6.550ctルース

[Kikyo Cut] Green Quartz 6.550ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

Sold out シトリン 7.620ctルース

[Kikyo Cut] Citrine 7.620ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

Sold out 【桔梗カット】アイリスクォーツ 31.670ct《シミズ貴石代表・清水幸雄氏》 ワッペン付

[Kikyou Cut] Iris Quartz 31.670ct《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

Sold out インペリアルトパーズ 1.065ctルース

[Dandelion cut] Imperial topaz 6.5mm/1.065ct loose

Sold out 【ダンデライオンカット】ファイアオパール 7mm ルース ワッペン付

[Dandelion Cut] Fire Opal 7mm Loose with Patch

Sold out 【ダンデライオンカット】ファイアオパール7mmルース ワッペン付

[Dandelion cut] Fire opal 7mm loose with patch

Sold out 化石採掘体験に挑戦してみよう「自分で出来る化石発掘体験セット」

Let's try the fossil mining experience "Do-it-yourself fossil excavation experience set" + bonus of fossil stickers, simple black light, and amber (copal) [Multiple purchase discounts available]

Sold out Let's try the gem mining experience "Do-it-yourself gem excavation experience set" 《7 types of gems》

Let's try the gem mining experience "Do-it-yourself gem excavation experience set" 《7 types of gems》

Sold out ブラジル産パライバトルマリン 0.173ctルース（CuO:2.1%、Mn:2.1%）

Paraiba tourmaline from Brazil 0.173ct loose (CuO:2.1%, Mn:2.1%)

Sold out 宝石研磨に挑戦してみよう「自分で出来る原石磨きセット」（初心者向け：ネオンブルーアパタイト）

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: neon blue apatite)

Sold out 【12534588掲載】ピンクアメジスト 5.470ctルース

[Kikyou cut] Pink amethyst 5.470ct loose with patch

Sold out 【カラフリ】Pt950アレキサンドライト0.08ct リング - カラッツSTORE

[Colorful] Pt950 Alexandrite 0.08ct ring

Sold out モザンビーク産非加熱ルビー 0.240ctルース GIA

Unheated ruby ​​from Mozambique 0.240ct loose GIA

Sold out モザンビーク産非加熱ルビー 0.30ctルース GIA

Unheated ruby ​​from Mozambique 0.30ct loose GIA

Sold out モザンビーク産非加熱ルビー 0.270ctルース GIA

Unheated ruby ​​from Mozambique 0.270ct loose GIA

Sold out ベトナム産非加熱スタールビー1.490ctルース GIA

Unheated star ruby ​​from Vietnam 1.490ct loose GIA

Sold out ノンオイルエメラルド 0.38ctルース GIA

Oil-free emerald 0.38ct loose GIA

Sold out ブラジル産パライバトルマリンキャッツアイ 0.720ctルース（CuO:2.2%,Mno:3.6%）

Brazilian Paraiba tourmaline cat's eye 0.720ct loose (CuO:2.2%, Mno:3.6%)

Sold out パラサイティックペリドット 0.230ctルース 日独鑑

Paracytic Peridot 0.230ct Ruth Japanese-German Edition

Sold out パラサイティックペリドット 0.371ctルース 日独鑑

Paracytic Peridot 0.371ct Ruth Japanese-German Edition

Sold out パラサイティックペリドット 0.328ctルース 日独鑑

Paracytic Peridot 0.328ct Ruth Japanese-German Edition

Sold out ペイナイト 0.074ctルース 日独鑑

Paynight 0.074ct Ruth Japanese-German book

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） 1.159ctルース 日独鑑

Russian demantoid garnet (horsetail recognized) 1.159ct loose Japanese-German edition

Sold out ハックマナイト 0.100ctルース

Hackmanite 0.100ct loose

Sold out タイ産クリムゾンレッドルビー 1.160ctルース GIA

Crimson Red Ruby from Thailand 1.160ct Ruth GIA

Sold out ファイアオパール 3.380ctルース

Fire opal 3.380ct loose

Sold out コロンビア産ノンオイルエメラルド 0.090ctルース GIA

Colombian oil-free emerald 0.090ct loose GIA

Sold out ボルダーオパール 1.454ctルース

Boulder opal 1.454ct loose

Sold out 【KEN氏】スファレライト 3.900ctルース - カラッツSTORE

Sphalerite 3.900ct loose stone

Sold out マスグラバイト 0.173ctルース

Musgravite 0.173ct loose

Sold out ウルツァイト 0.181ctルース 日独鑑

Wurzite 0.181ct loose Japanese-German book

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

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.