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Sold out Kenyan Tsavorite 0.157ct Loose Gemstone

Kenyan Tsavorite 0.157ct Loose Gemstone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.867ct Loose Stone

Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.867ct Loose Stone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.894ct Loose Stone

Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.894ct Loose Stone
Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka

0.321ct Blue Sapphire Loose Gemstone from Sri Lanka
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone

Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone
Sold out Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone
Sold out Australian black opal 3.148ct loose

Australian black opal 3.148ct loose
Sold out Australian black opal 0.435ct loose stone

Australian black opal 0.435ct loose stone
Sold out 1.091ct loose Australian black opal

1.091ct loose Australian black opal
Sold out Brazilian bicolor tourmaline 1.016ct loose stone

Brazilian bicolor tourmaline 1.016ct loose stone
Sold out Sri Lankan Yellow Sapphire 0.526ct Loose

Sri Lankan Yellow Sapphire 0.526ct Loose
Sold out モンゴル産アンデシン 1.354ctルース

Andesine from Mongolia 1.354ct loose
Sold out 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） 6.004ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 6.004ct loose
Sold out Cornflower Blue Sapphire 0.680ct Loose AIGS

Cornflower Blue Sapphire 0.680ct Loose AIGS
Sold out アメリカ産レッドベリル 0.143ctルース

American red beryl 0.143ct loose
Sold out アメリカ産レッドベリル 0.115ctルース

American red beryl 0.115ct loose
Sold out Diamond 0.120ct loose (G, VS2, Excellent H&C)

Diamond 0.120ct loose (G, VS2, Excellent H&C)
Sold out ダイヤモンド 0.096ctルース(D, SI1)

Diamond 0.096ct loose (D, SI1, octagonal cut)
Sold out ダイヤモンド 0.126ctルース(F, VS2)

Diamond 0.126ct loose (F, VS2, octagonal cut)
Sold out 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） 0.666ctルース

Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.666ct loose
Sold out 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） 0.570ctルース

Andesine Labradorite (commonly known as Rainbow Moonstone) from Madagascar 0.570ct loose
Sold out Paraiba tourmaline from Brazil 0.066ct loose

Paraiba tourmaline from Brazil 0.066ct loose
Sold out ナイジェリア産モルガナイト 0.889ctルース

Morganite from Nigeria 0.889ct loose
Sold out 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース

Zimbabwean Euclase 0.138ct Loose Stone
Sold out Unheated Brazilian Bicolor Topaz (Bicolor Blue Topaz) 2.884ct Loose Gemstone

Unheated Brazilian Bicolor Topaz (Bicolor Blue Topaz) 2.884ct Loose Gemstone
Sold out [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone

[Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
Sold out 【12560359掲載】ジンバブエ産バイカラーユークレース 0.654ctルース

Zimbabwean Bicolor Euclase 0.654ct Loose Stone
Sold out Panda Cut Gacha💎 Brazilian Paraiba Tourmaline (0.226ct/CuO: 0.7%, MnO: 2.5%) - 1 Stone, 5 Panda Cut Stones (Multiple Purchase Discounts Available)

Panda Cut Gacha💎 Brazilian Paraiba Tourmaline (0.226ct/CuO: 0.7%, MnO: 2.5%) - 1 Stone, 5 Panda Cut Stones (Multiple Purchase Discounts Available)
Sold out K18/Pt950 Brazilian Paraiba tourmaline 0.071ct diamond ring (K18YG, CuO: 1.9%, MnO: 2.2%)

K18/Pt950 Brazilian Paraiba tourmaline 0.071ct diamond ring (K18YG, CuO: 1.9%, MnO: 2.2%)
Sold out 18K Yellow Gold Brazilian Paraiba Tourmaline 0.048ct Diamond Pinky Ring (CuO: 1.7%, MnO: 2.2%)

18K Yellow Gold Brazilian Paraiba Tourmaline 0.048ct Diamond Pinky Ring (CuO: 1.7%, MnO: 2.2%)
Sold out K18/Pt950 Brazilian Paraiba Tourmaline and Diamond Pendant Top (Necklace Top)

K18/Pt950 Brazilian Paraiba Tourmaline and Diamond Pendant Top (Necklace Top)
Sold out Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}

Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}
Sold out 《Limited to 15 Stones》Rare Stone Gacha 💎 Featuring non-oiled red beryl with GIA certificate for 98,000 yen, cinnabar, Mozambique Paraiba tourmaline, benitoite, and more. 《Multiple purchase discount available》

《Limited to 15 Stones》Rare Stone Gacha 💎 Featuring non-oiled red beryl with GIA certificate for 98,000 yen, cinnabar, Mozambique Paraiba tourmaline, benitoite, and more. 《Multiple purchase discount available》
Sold out [Takeshi Yamamoto] Brazilian Dendritic Quartz 25.875ct Loose

[Takeshi Yamamoto] Brazilian Dendritic Quartz 25.875ct Loose
Sold out 0.245ct rough diamond (with trigon)

0.245ct rough diamond (with trigon)
Sold out Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity

Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity
Sold out Tanzanian Violet Sapphire 0.920ct Loose

Tanzanian Violet Sapphire 0.920ct Loose
Sold out Tanzanian Kornerupine 0.103ct Loose Stone

Tanzanian Kornerupine 0.103ct Loose Stone
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.674ct Loose Stone

Cambodian Blue Zircon (Ratanakiri Blue) 0.674ct Loose Stone
Sold out Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)

Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)
Sold out Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan

Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan
Sold out Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS

Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS
Sold out 【12560374掲載】ブルートパーズキャッツアイ 22.761ctルース

Brazilian Blue Topaz Cat's Eye 15mm/22.761ct Loose Stone
Sold out Tanzanian Dragon Garnet 1.181ct Loose Stone

Tanzanian Dragon Garnet 1.181ct Loose Stone
Sold out 《Limited 7 Stones》Sri Lankan Green Zircon (Special Cut, including Silky Type)《Multi-purchase Discount Available》

《Limited 7 Stones》Sri Lankan Green Zircon (Special Cut, including Silky Type)《Multi-purchase Discount Available》
Sold out Grandidierite from Madagascar 0.167ct loose stone

Grandidierite from Madagascar 0.167ct loose stone
Sold out Grandidierite from Madagascar 0.169ct loose stone

Grandidierite from Madagascar 0.169ct loose stone
Sold out Indian Parrot Chrysoberyl Cat's Eye 1.225ct Loose

Indian Parrot Chrysoberyl Cat's Eye 1.225ct 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.