Birthstone list

Mexican Fire Opal 0.718ct Loose Sale price¥9,800

YAG (Yttrium Aluminum Garnet) 3.3mm/0.208ct Loose Stone (Rose Cut) Sale price¥5,980

YAG (Yttrium Aluminum Garnet) 4.1mm/0.346ct Loose Stone (Rose Cut) Sale price¥8,800

YAG (Yttrium Aluminum Garnet) 4.9mm/0.574ct loose stone Sale price¥8,800

YAG (Yttrium Aluminum Garnet) 3.9mm/0.317ct loose stone Sale price¥6,980

Bolivian Ametrine 36.887ct loose stone Sale price¥79,800

K18 白蝶真珠（白蝶パール）鳥モチーフペンダントトップ（ネックレストップ）鑑別書

[Sale on 6/22 at 10 PM] Colorful K18 White South Sea Pearl, 0.17ct Diamond, Ruby, Sapphire, Emerald Bird Motif Pendant Top (Necklace Top) with Appraisal Report Sale price¥198,000

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） 0.582ctルース

[On sale June 21st at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.582ct Loose Stone Sale price¥6,980

Indian Moonstone 8mm/1.879ct Loose Sale price¥6,980

American Herkimer Diamond (Rock Crystal) 5.5mm/0.528ct Loose Sale price¥8,800

Tanzanian Rhodolite Garnet 0.810ct Loose Stone Sale price¥9,800

Russian Diamond Rough (Sawable) 0.103ct Loose (Trigon) Sale price¥25,800

非加熱ブラジル産パライバトルマリン 0.060ctルース（CuO:1.6%、MnO:2.3%）

Brazilian Paraiba Tourmaline 0.060ct Loose (CuO:1.6%, MnO:2.3%) Sale price¥42,800

Blue sapphire 0.287ct loose Sale price¥12,800

Almandine Garnet 1.058ct Loose Stone Sale price¥12,800

Almandine Garnet 1.485ct Loose Stone Sale price¥15,800

Almandine Garnet 1.988ct Loose Stone Sale price¥16,800

Almandine Garnet 1.388ct Loose Stone Sale price¥11,800

Almandine Garnet 1.471ct Loose Stone Sale price¥14,800

Australian black opal 3.242ct loose stone Sale price¥59,800

Tanzanite from Tanzania 0.385ct loose stone Sale price¥8,800

Tanzanite from Tanzania 0.245ct loose stone Sale price¥8,800

Pt900グロッシュラーガーネット 1.38ct・ダイヤモンド0.13ctリング鑑別書

[On sale 6/27 10 PM] [Colorful] Pt900 Grossular Garnet 1.38ct and Diamond 0.13ct Ring with Appraisal Sale price¥98,000

[On sale June 27th at 10 PM] [Colorflee] K18 Blue Sapphire 1.89ct / Diamond 0.74ct Ring with Appraisal Report Sale price¥298,000

Tanzanite from Tanzania 0.497ct loose stone Sale price¥9,800

Brazilian Green Tourmaline 0.332ct Loose Stone Sale price¥7,980

Brazilian Green Tourmaline 0.376ct Loose Stone Sale price¥7,980

Brazilian Green Tourmaline 0.825ct Loose Stone Sale price¥9,800

Brazilian Paraiba Tourmaline 0.360ct Loose GIA Sale price¥298,000

【甲州貴石切子plusthree】メキシコ産ファイアオパール 4.633ctルース《コラボ》ワッペン

[Koshu Precious Stones plusthree] Mexican Fire Opal 4.633ct Loose Stone [Collaboration] Patch Sale price¥49,800

Russian rough diamond (sawable) 0.088ct loose Sale price¥19,800

Brazilian Pink Tourmaline 0.418ct Loose Stone (Rouge Cut) Sale price¥8,800

Tanzanian Lavender Tanzanite 0.577ct Loose Stone Sale price¥12,800

Tanzanian bicolor tanzanite 0.573ct loose stone Sale price¥12,800

Tanzanian Lavender Tanzanite 0.558ct Loose Stone Sale price¥12,800

Diamond loose/certificate transfer fee Sale price¥8,800

インターナリーフローレスダイヤモンド 0.272ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000

Pt950 アレキサンドライト 0.08ct・ダイヤモンド0.25ctリング鑑別カード

[On sale June 30th at 10 PM] Colorful Pt950 Alexandrite 0.08ct Diamond 0.25ct Ring with Identification Card Sale price¥98,000

Pt900 ブルーサファイア 0.43ct・ダイヤモンド0.44ctリング鑑別書

[Item ID: 22602630] [Karafuri] Pt900 Blue Sapphire 0.43ct Ring Sale price¥98,000

Pt950 ムーンストーンキャッツアイ 3ct ・ムーンストーンキャッツアイリング鑑別書

[Listed as 22602642][Colorful] Pt950 Moonstone Cat's Eye 3ct Ring Sale price¥79,800

Pt950 ムーンストーンキャッツアイ 1.5ct ペンダントトップ（ネックレストップ）鑑別書

[Published on 22602643] [CALAFULI] Pt950 Moonstone Cat's Eye 1.5ct Pendant Top Sale price¥45,800

[Posted on 22602644] [Calafri] K18 Synthetic Sapphire Ring Sale price¥45,800

[Listed on 22602645] [Colorful] Pt900 Ruby 0.6ct Ring Sale price¥98,000

[Published in 12563422] Malawi Moonstone (Malawi Moonstone) 2.183ct Loose Sale price¥12,800

[12563423] Malawi Moonstone 1.747ct Loose Sale price¥9,800

[Posted 12563424] Malawi Moonstone 2.283ct Loose Stone Sale price¥12,800

[On sale 7/24 10 PM] Malawi Moonstone 1.939ct Loose Gemstone Sale price¥12,800

[On sale July 24 at 10 PM] Malawi Moonstone 1.684ct Loose Gemstone Sale price¥9,800

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.