Birthstone list

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Colombian pyrite-mica emerald 0.844ct loose stone

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Colombian emerald 0.167ct loose stone with jewel

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Mexican Opal 1.666ct Loose

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ロシア産デマントイドガーネットキャッツアイ（ホーステール認む） 0.200ctルース

Russian Demantoid Garnet Cat's Eye (Horsetail Recognized) 0.200ct Loose

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Pt950 アウイナイト 0.24ct・ダイヤモンド0.18ctリング鑑別カード

[Available 5/18 10PM] [Colorful] Pt950 Hauyne 0.24ct / Diamond 0.18ct Ring with Certificate

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【5/23 22時販売】《限定11石》カービングガチャ💎通常29,800円のイチゴカット43ctのブルートパーズ・フラワーカットのアメジスト・プルメリアカットなど（おまけで特殊カットブルートパーズ8-10mm）《複数購入割引有》　

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Brazilian Bi-Color Tourmaline 3.785ct Loose Stone [On sale May 27th, 10 PM JST]

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[Koshu Precious Stones plusthree] Citrine 5.121ct Loose

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Colombian pyrite emerald 3.817ct loose stone

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Mozambique Elbaite Tourmaline 1.793ct Loose Stone

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Ethiopian Opal 5.7mm/0.878ct Loose (Sphere)

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Madagascar Padparadscha Sapphire 0.517ct Loose DGL Certified

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[On sale May 27th at 10 PM JST] Madagascar Paparadscha Sapphire 0.177ct Loose Stone DGL Certified

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[Sale on 6/6 at 10 PM JST] Brazilian Seafoam Tourmaline 0.347 ct Loose Gemstone

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【On sale May 30th at 10 PM JST】Tanzanian Tanzanite 0.328ct Loose Stone

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[On sale May 30th at 10 PM] Kenyan Tsavorite 4.1mm/0.386ct Loose Stone

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[On sale June 4th at 10 PM] Kenyan Tsavorite 0.505ct Loose Stone

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ピンクダイヤモンド（クッションカット） 0.157ctルース(FANCY DEEP PUPPLE PINK, I1)

Pink Diamond (Cushion Cut) 0.157ct Loose (FANCY DEEP PURPLISH PINK, I1)

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グレーダイヤモンド 0.039ctルース(LIGHT BLUISH GRAY, VS-1)

Gray Diamond 2.1mm/0.039ct Loose (LIGHT BLUISH GRAY, VS-1)

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グレーダイヤモンド 0.064ctルース(LIGHT BLUISH GRAY, SI-1)

Gray Diamond 2.5mm/0.064ct Loose (LIGHT BLUISH GRAY, SI-1) Rare Stone

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ブラウンダイヤモンド 0.600ctルース(FANCY LIGHT BROWN, SI-2)

Brown Diamond 5.3mm/0.600ct Loose Stone (FANCY LIGHT BROWN, SI-2)

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ダイヤモンド 3.2mm/0.124ctルース(D, VS-2, VeryGood)

【On Sale 5/30 10 PM】Diamond 3.2mm/0.124ct Loose Stone (D, VS-2, VeryGood)

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Mexican Hyalite Opal 1.215ct Loose (Faceted Cut)

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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） 0.971ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.2mm/0.971ct Loose Stone

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Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.826ct loose

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[Sale on June 12 at 10 PM] Ruby 0.496 ct Loose Stone (Hokikyō)

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Kashmir Unheated Sapphire 2.6mm/0.100ct Loose GIA

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[Lottery Sale 6] [For Winners Only] [Listed as 12563302] Unheated Kashmir Sapphire 2.6mm/0.100ct Loose Stone GIA

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Unheated Kashmir Sapphire 3.0mm/0.130ct Loose Stone GIA

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Kashmir Sapphire 2.5mm/0.090ct Loose Stone GIA

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Pt950 デマントイドガーネット 0.50ctct ペンダントトップ（ネックレストップ）鑑別書

[On sale June 14, 10 PM] [Colorfle] Pt950 Demantoid Garnet 0.50ct Pendant Top (Necklace Top) with appraisal

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[On sale June 12, 10 PM JST] Madagascar Padparadscha Sapphire 4.1mm/0.396ct Loose Stone DGL Certified

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[On sale May 30th at 10 PM] Malawi Moonstone 0.639ct Loose

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[Sale on June 7 at 10 PM] Malawi Moonstone 2.086ct Loose Stone

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[Sale starts at 10 PM on June 6] Malawi Moonstone 2.561ct Loose Stone

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Brazilian Imperial Topaz 1.237 ct Loose Stone with Certificate of Authenticity [On Sale June 5th at 10 PM]

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[On Sale June 6th at 10 PM] Afghanistan Blue Watermelon Tourmaline 2.380ct Loose Stone

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Unheated Kashmir Sapphire 0.120ct Loose Stone GIA

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Kashmir Unheated Sapphire 0.220ct Loose GIA

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[On sale June 3rd, 10 PM JST] Nepali Bicolor Green Kyanite 1.181ct Loose Stone

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Unheated Teal Green Sapphire 2.140ct Loose Stone GIT

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[On sale June 8th, 10 PM] Bi-Color Sapphire 1.040 ct Loose Gemstone GIT

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[On Sale June 6th at 10 PM] Madagascar Padparadscha Sapphire 3.9mm/0.296ct Loose Stone with DGL Certificate

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Mozambique Rubellite 0.410ct Loose Stone

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Brazilian Pink Tourmaline 0.470ct Loose Stone

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Russian rough diamond (sawable) 0.117ct loose

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[On Sale June 18, 10 PM] [Karafuri] K18/SILVER/Pd Amethyst, Imperial Topaz Pendant Top (Necklace Top) with Appraisal Report

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[On sale at 10 PM on June 8th] Pt900 Benitoite 0.135ct and Diamond 0.26ct Ring

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.