Pre-sale

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Australian Black Opal 0.877ct Loose

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Loose Colombian emerald, 0.135 ct, Hōki Kyō (Japan Gem Laboratory)

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ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 2.858ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 2.858 ct loose stone

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ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 2.795ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 2.795ct Loose

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ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 3.108ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 3.108ct Loose

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ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 3.865ctルース

Loose Brazilian Tinkerbell Quartz (Pink Fire Quartz) 3.865ct

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Loose American Oregon Sunstone 7.0mm/1.389ct

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[Limited to 6 stones] Rainbow Aquamarine 1 stone loose (avg. 0.7ct) [Multi-purchase discount available]

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《Limited to 7 stones》American Ant Hill Garnet (round cut, approx. 3mm) 《Multiple purchase discount available》

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[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone

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[Limited to 15 Gems] Forest Green with certificate, normally ¥29,800, Canary Yellow or Ice Blue treated diamond gacha, normally ¥22,800. [Multi-purchase discount available]

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Pt900ブラックオパール 3.17ct・ダイヤモンド0.105ctペンダントトップ（ネックレストップ）鑑別書

[Listed in 22602653] [Colorflee] Black Opal 3.17ct Pendant Top (Necklace Top)

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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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[Listed as 12563375] Zimbabwean Euclase 0.065ct Loose Gemstone

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

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[On sale July 4th at 10 PM] "Hong Kong Procurement - Limited to 24 Stones" Vibrant Lazurite Loose Stones from Pakistan "Bulk Purchase Discount Available"

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《Limited to 1 set》11 Stone Treated Diamond Set (approx. 1.2mm x 11 stones) 《Bulk Purchase Discount Available》

coming soon

[Lottery Sale 0531_09] Nigerian Mint Green Tourmaline 1.319ct Loose Stone with Certificate Sale price¥55,800

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Diamond 3.7mm/0.197ct Loose (K, VS-2, VeryGood)

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イエローダイヤモンド 0.262ctルース(UNDER S(LIGHT YELLOW), VS1)

Yellow Diamond 0.262ct Loose (LIGHT YELLOW, VS-1, Princess Cut)

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Pt900 エメラルド 0.30ct ・ダイヤモンド0.01ctペンダントトップ（ネックレストップ）

[Karafuru] Pt900 Emerald 0.30ct / Diamond 0.01ct Pendant Top

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Burmese ruby 3.1mm/0.120ct loose stone with gemological report

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0.300 ct Loose Mozambique Ruby with Certificate

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Brazilian Dumortierite in Quartz 1.349ct Loose Stone

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Brazilian Dumortierite in Quartz 1.082ct Loose Stone

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Brazilian Dumortierite in Quartz 1.040 ct Loose Gemstone

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Brazilian Black Garden Quartz 3.621ct Loose

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ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 4.823ctルース

Pink Fire Quartz (Tinkerbell Quartz) from Brazil, 11mm/4.823ct loose stone

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ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 1.967ctルース

1.967ct Loose Tinkerbell Quartz (Pink Fire Quartz) from Brazil

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Euclase from Zimbabwe 0.053ct Loose Gemstone with Certificate

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

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Madagascan Grandidierite 2.8mm/0.086ct Loose Stone with Certification

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Madagascar Grandidierite 2.5mm/0.065ct Loose Stone with Certification

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

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0.415ct Mozambique Ruby Loose Stone with Gemstone Identification Report

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Madagascar padparadscha sapphire 3.3mm/0.156ct loose stone (with CGL certificate)

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Madagascar Padparadscha Sapphire 3.5mm/0.206ct Loose, Central Gem Laboratory

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Kochi Prefecture deep red coral 7.815ct loose gemstone

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[On sale 8/3 at 10 PM] Malawi Moonstone 1.747ct Loose Gemstone

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[6/ 10 PM JST release] 《Limited 10 Stones》 Iolite Gacha featuring Koshu-Kiseki-Kiriko plusthree 《Bulk purchase discount available》

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K18 ペリステライト 0.66ct・ダイヤモンドペンダントトップ（ネックレストップ）鑑別書

[22602614 Listed] [Calafli] K18 Peristerite 0.66ct Pendant Top (Necklace Top)

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インターナリーフローレスダイヤモンド（H&C） 5.1mm/0.527ctルース(E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C)

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インターナリーフローレスダイヤモンド 0.217ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA

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フローレスダイヤモンド（H&C） 0.290ctルース(D, FL, 3Excellent H&C)

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab

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フローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, FL, 3Excellent H&C) GIA&中宝

【Lottery Sale 0620_09】Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL

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Brazilian Flower Rutile in Quartz 5.122ct Loose Stone

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Synthetic Alexandrite 0.471ct loose stone

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Brazilian Pink Tourmaline 0.418ct Loose Stone (Rouge Cut)

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.