Birthstone list

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Diamond 0.120ct loose (G, VS2, Excellent H&C)

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Unheated Brazilian Bicolor Topaz (Bicolor Blue Topaz) 2.884ct Loose Gemstone

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Sri Lankan Twin Star Sapphire 5.225ct Loose

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Sri Lankan Twin Star Sapphire 3.928ct Loose

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[On Sale at 10 PM on December 7th] Rainbow Garnet (Andradite Garnet) 5.4mm/0.771ct Loose Stone from Tenkawa Village, Nara Prefecture

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[12/10 22:00] Mali Garnet (Grossular/Andradite Garnet) 1.008ct Loose Stone from the Republic of Mali with Certificate of Authenticity

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White Diamond 6.2mm/0.988ct Loose (FANCY WHITE, I2)

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Australian white opal 4.170ct loose

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Paraiba tourmaline from Mozambique 0.256ct loose

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Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho

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Unheated Kashmir Sapphire 0.260ct Loose Stone GIA

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Unheated Kashmir sapphire 0.210ct loose GIA

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Pink sapphire from Mozambique 0.213ct loose (hot pink sapphire)

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Brazilian bicolor tourmaline 1.554ct loose (tricolor tourmaline)

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ブラジル産パーティカラーパライバトルマリン 0.149ctルース（CuO:1.4%、MnO:2.8%）

Particolor Paraiba tourmaline from Brazil 0.149ct loose (CuO:1.4%, MnO:2.8%)

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GGG (Gadolium Gallium Garnet) 1.424ct Loose Stone

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Diamond 0.131ct loose (F, VS-1, octagonal cut)

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Pt900/Pt850アウイナイト0.08ct ペンダント（ネックレス） - カラッツSTORE

[Colorful] Pt900/Pt850 Auinite 0.08ct pendant (necklace)

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American Peridot 0.573ct Loose Stone (Lily Pad Inclusions)

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Grey Tourmaline 0.486ct Loose Stone with Certificate of Authenticity

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Unheated Ruby 4.5mm/0.430ct Loose GIT

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Tanzanite from Tanzania 7.4mm/1.747ct loose stone

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Russian demantoid garnet (horsetail recognized) 0.110ct loose

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Tanzanian Spessartine Garnet 0.383ct Loose Stone

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Mexican Fire Opal 5.8mm/0.345ct Loose Stone

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Padparadscha Sapphire 0.376ct Loose Stone

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Russian Demantoid Garnet (Horsetail) 2.5mm/0.075ct Loose Stone

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ロシア産デマントイドガーネット（ホーステール認む） 2.5mm/0.073ctルース

Russian Demantoid Garnet (Horsetail) 2.5mm/0.073ct Loose Stone

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インド産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.450ctルース

Indian Andesine Labradorite (also known as Rainbow Moonstone) 0.450ct Loose Stone

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Sri Lankan Purple Star Sapphire 2.185ct Loose

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[Posted 12546242] Swiss blue topaz 13.257ct loose

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Paraiba tourmaline from Mozambique 0.266ct loose

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Brazilian green tourmaline 0.490ct loose stone

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Tanzanian Dragon Garnet 0.850ct Loose Stone

coming soon

American Anthill Garnet (Chrome Pyrope Garnet) 5mm/0.540ct Loose Sale price¥22,800

coming soon

[Koshu Precious Stone Kiriko]《Moon-shaped Kiriko》Citrine 6.097ct《Collaboration》With loose patch Sale price¥69,800

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【32501456掲載】ピンクダイヤモンド（プリンセスカット） 0.089ctルース(FANCY LIGHT PURPLISH PINK, I-1)

[Posted in 32501456] Pink Diamond (Princess Cut) 0.089ct Loose (FANCY LIGHT PURPLISH PINK, I-1)

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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） 6mm/0.669ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6mm/0.669ct Loose Stone

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イエローダイヤモンド 0.121ctルース(FANCY INTENSE YELLOW, VS-1)

[Posted in 32501431] Yellow Diamond 0.121ct Loose (FANCY INTENSE YELLOW, VS-1)

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イエローダイヤモンド 0.706ctルース(FANCY DEEP ORANGY YELLOW, I-1)

[Posted in 32501430] Yellow Diamond 0.706ct Loose (FANCY DEEP ORANGY YELLOW, I-1)

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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） 0.984ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.3mm/0.984ct Loose Stone (Rose Cut)

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Russian demantoid garnet (horsetail recognized) 4.2mm/0.336ct loose

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ロシア産デマントイドガーネット（ホーステール認む） 4.4mm/0.394ctルース

Russian demantoid garnet (horsetail recognized) 4.4mm/0.394ct loose

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ロシア産デマントイドガーネット（ホーステール認む） 4.6mm/0.423ctルース

Russian demantoid garnet (horsetail recognized) 4.6mm/0.423ct loose

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ロシア産デマントイドガーネット（ホーステール認む） 4.2mm/0.319ctルース

Russian demantoid garnet (horsetail recognized) 4.2mm/0.319ct loose

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【NOBU氏】アマゾン産グリーンオパール《コラボ》6.8mmルース - カラッツSTORE

[Mr. NOBU] Green Opal from Amazon [Collaboration] 6.8mm 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.