Sa line

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【ダンデライオンカット】シトリン 5.58ctルース（ライトカラー） - カラッツSTORE

[Dandelion cut] Citrine 5.58ct loose (light color)

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【さくらインカット】オレゴンサンストーン 1.55ctルース - カラッツSTORE

[Sakura Incut] Oregon Sunstone 1.55ct Loose

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[Lottery Sale 0718_09] Tanzanian Pink Zoisite 0.835ct Loose Stone with Gem Identification Report

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[Sale begins August 24th at 10 PM JST] Tanzanian Sunstone (Illusion Sunstone) 5.5mm/0.498ct Loose Stone

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Madagascar Bi-Color Sapphire 1.665ct Loose Gemstone

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[On sale August 28th, 10 PM] Cambodian Blue Zircon (Ratanakiri Blue) 0.419ct Loose Stone with Appraisal

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[Sales Start: August 27, 10 PM JST] 0.523ct Tanzanian Violet Sapphire Loose Gemstone (Color Change Sapphire) with Certification

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[Sales start August 27, 10 PM JST] Tanzanian Sapphire 0.622 ct Loose (Color Change Sapphire) with Appraisal Report

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【Lottery Sale 0825_06】Madagascar Sapphire 1.480ct Loose GIA

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【Listed on 12564012】Madagascar Orange Sapphire 0.671ct Loose

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[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available

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[Listed as 12564067] Brazilian Spessartine Garnet 0.923ct Loose Stone

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[Lottery Sale 0731_07] Unheated Montana Sapphire (Yogo Mine) 0.186ct Loose Stone with Japan-Germany Gemological Analysis Report

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Pt900 マダガスカル産パパラチアサファイア 4.2mm/0.34ct ・ダイヤモンド0.18ctペンダントトップ（ネックレストップ）中宝鑑

Pt900 Madagascar Paparadscha Sapphire 4.2mm/0.34ct ・Diamond 0.18ct Pendant Top, Central Gemological Laboratory of Japan certified

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[#202607AkihabaraPopUpTakeOut][12563062Published] Padparadscha Sapphire 0.690ct Loose Stone

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#202607 Akihabara Pop-up Store (currently out of office) #12563139 Listed: Brazilian Santa Maria Aquamarine, 0.339ct Loose Stone

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K18 マダガスカル産パパラチアサファイア 0.278ct・ダイヤモンド0.67ctリング DGL鑑

K18 Madagascar Padparadscha Sapphire 0.278ct / Diamond 0.67ct Ring DGL Certification

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[On Sale August 13 at 10 PM] 0.669ct Loose Sphene from Zimbabwe with Certificate

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Sphene from Brazil (Fana-ginho), 0.476 ct, with laboratory report

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【ダンデライオンカット】タンザニア産ブルースピネル 6.0mm/0.953ctルース鑑別書鑑定士が運営しています。

[Dandelion Cut] Tanzanian Blue Spinel 6.0mm/0.953ct Loose Stone with Certificate

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Pt900 ピンクサファイア 0.465ct・ダイヤモンド0.12ctリング鑑別書

[On sale August 6th, 10 PM JST] [Colorflee] Pt900 Pink Sapphire 0.465ct, Diamond 0.12ct Ring with identification report

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0.566ct Loose Blue Sapphire from Sri Lanka, with Japan-Germany appraisal

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[Item 12563752] Tanzania Color-Change Winza Sapphire, 0.621ct Loose

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[Lottery Sale 0825_11] Cambodian Blue Zircon (Ratanakiri Blue) 8.1mm/3.256ct Loose Stone with Certificate

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Madagascar Unheated Royal Blue Sapphire 1.030ct Loose AIGS

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0.159 ct Loose Padparadscha Sapphire from Madagascar, Central Gem Laboratory certified

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Madagascar Padparadscha Sapphire 4.0mm/0.305ct Loose Gem, Central Gemological Laboratory

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Madagascar Bicolor Sapphire 0.506ct Loose

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[Published on 12563061] Padparadscha Sapphire 0.897ct Loose Stone

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【掲載番号12563727】スリランカ産パープルサファイア 0.634ctルース

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0.294ct Loose Australian Rainbow Lattice Sunstone

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USA Origin Oregon Sunstone 7.0mm/1.441ct Loose

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1.170ct Loose Australian Rainbow Lattice Sunstone

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Tanzanian Bicolor Zoisite 1.136ct Loose Stone with Certification

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Jeremejevite from Namibia 0.094ct Loose Stone with Certification

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0.400ct Unheated Color Change Sapphire from Burma (Myanmar) - GIA

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Burmese unheated color change sapphire 0.440ct loose GIA

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Spanish Sphalerite 6.1mm/1.197ct Loose Stone

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1.004 ct Loose Unheated Yellow Star Sapphire from Myanmar, with Japan-Germany Gemological Report

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ミャンマー産グレースピネル（プラチナスピネル） 4.2mm/0.385ctルース

Burmese grey spinel (platinum spinel) 4.2mm/0.385ct loose gemstone

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Loose American Oregon Sunstone 7.0mm/1.389ct

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[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone

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Pt900 ブルーサファイア 0.52ct・ダイヤモンド0.19ctペンダントトップ（ネックレストップ）鑑別書

[22602649 Published] [Colorful] Pt900 Blue Sapphire 0.52ct Pendant Top (Necklace Top)

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[Lottery Sale_0612_08] Unheated Purple Sapphire 0.775ct Loose Gemstone - Houseki Kyo

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Pt900/Pt850 カンボジア産ブルージルコン（ラタナキリブルー） 2.45ct ペンダント（ネックレス）中宝ソ

Pt900/Pt850 Cambodia Blue Zircon (Ratanakiri Blue) 2.45ct/Diamond 0.26ct Pendant (with necklace) Central Gem Lab certified

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Kashmir unheated sapphire 0.350ct loose stone GIA

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Sri Lankan Blue Sapphire 4.0mm/0.269ct Loose with Certificate

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Tanzanian Windsor Sapphire (Brown Sapphire) 1.137ct Loose Stone with Gemstone Identification Report

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.