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Sold out パープルサファイア 0.419ctルース

Purple sapphire 0.419ct loose stone
Sold out コンゴ産ダイオプテーズ 52.488ct原石

Congo Dioptase 52.488ct rough stone
Sold out コンゴ産ダイオプテーズ 34.022ct原石

Congo Dioptase 34.022ct rough stone
Sold out コンゴ産ダイオプテーズ 85.471ct原石

Congo Dioptase 85.471ct rough stone
Sold out スペイン産バイカラースファレライト 0.765ctルース

Spanish bicolor sphalerite 0.765ct loose stone
Sold out スペイン産スファレライト 0.788ctルース

Spanish Sphalerite 5.3mm/0.788ct loose stone
Sold out スリランカ産スターサファイア 1.237ctルース

Sri Lankan Star Sapphire 1.237ct Loose
Sold out マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.149ctルース

Bekily Blue Garnet from Madagascar (color change garnet) 0.149ct loose
Sold out ブラジル産アレキサンドライトキャッツアイ 0.260ctルース

Brazilian Alexandrite Cat's Eye 3.3mm/0.260ct Loose Stone (Hemachita Mine)
Sold out メキシコ産オパール 0.327ctルース

Mexican Opal 4.9mm/0.327ct Loose
Sold out タンザニア産ロードライトガーネット 0.737ctルース

Tanzanian Rhodolite Garnet 0.737ct Loose Stone
Sold out タイ産ブルーサファイア 0.388ctルース

Thai Blue Sapphire 0.388ct Loose
Sold out タイ産ブルーサファイア 0.740ctルース

Thai Blue Sapphire 0.740ct Loose
Sold out ブラジル産アレキサンドライト 0.090ctルース

Brazilian Alexandrite 2.7mm/0.090ct Loose Stone JTL Catalog
Sold out メキシコ産カンテラオパール 4.300ctルース

Mexican Cantera Opal 4.300ct Loose
Sold out Limited to 8 stones: 1 Sri Lankan star sapphire loose stone (5mm, round cabochon cut) Multiple purchase discounts available

Limited to 8 stones: 1 Sri Lankan star sapphire loose stone (5mm, round cabochon cut) Multiple purchase discounts available
Sold out Limited to 6 stones: 1 loose sphene from Zimbabwe (multiple purchase discounts available)

Limited to 6 stones: 1 loose sphene from Zimbabwe (multiple purchase discounts available)
Sold out Limited to 9 stones: One loose Brazilian rainbow aquamarine (average 1.0 carat, pear cut) [Multiple purchase discounts available]

Limited to 9 stones: One loose Brazilian rainbow aquamarine (average 1.0 carat, pear cut) [Multiple purchase discounts available]
Sold out Brazilian Dendritic Quartz Kitten Cut Loose Stone (For Beginners) (5mm) (Multiple Purchase Discounts Available)

Brazilian Dendritic Quartz Kitten Cut Loose Stone (For Beginners) (5mm) (Multiple Purchase Discounts Available)
Sold out Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)

Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)
Sold out Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available

Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available
Sold out Limited to 9 stones: Carving Gacha (Opal, Tourmaline, Tsavorite Garnet) 1 loose stone (Multiple purchase discounts available)

Limited to 9 stones: Carving Gacha (Opal, Tourmaline, Tsavorite Garnet) 1 loose stone (Multiple purchase discounts available)
Sold out Limited to 10 stones! Zimbabwean Bicolor Euclase, Bicolor Sapphire, and More! Bicolor Loose Stones! 💎 Single Loose Stones Available. Discounts Available for Multiple Purchases.

Limited to 10 stones! Zimbabwean Bicolor Euclase, Bicolor Sapphire, and More! Bicolor Loose Stones! 💎 Single Loose Stones Available. Discounts Available for Multiple Purchases.
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 《Limited to 13 stones》Normally ¥49,800 Koshu Kiseki Kiriko plusthree "Subaru" lottery💎 Andesine Gacha《Multiple Purchase Discount Available》

《Limited to 13 stones》Normally ¥49,800 Koshu Kiseki Kiriko plusthree "Subaru" lottery💎 Andesine Gacha《Multiple Purchase Discount Available》
Sold out Madagascar Pezzottaite Gacha (2.2-2.5mm, Round Cut) - Limited to 6 Stones (Multiple Purchase Discount Available)

Madagascar Pezzottaite Gacha (2.2-2.5mm, Round Cut) - Limited to 6 Stones (Multiple Purchase Discount Available)
Sold out Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)

Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)
Sold out Midway coral branch (raw wood) 1 piece (March birthstone, coral, average 26ct, Midway coral) 《Multiple purchase discount available》

Midway coral branch (raw wood) 1 piece (March birthstone, coral, average 26ct, Midway coral) 《Multiple purchase discount available》
Sold out Guatemalan Jade (with certificate, 3-3.5mm) - 1 Stone Loose - Limited to 10 Stones - Multiple Purchase Discount Available

Guatemalan Jade (with certificate, 3-3.5mm) - 1 Stone Loose - Limited to 10 Stones - Multiple Purchase Discount Available
Sold out [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"
Sold out [On sale June 7th at 10 PM] Limited to 10 stones: Flower-cut gem gacha 💎 Cherry blossom shape normally 39,800 yen, and a ruby with a new cut (plus an extra new cut) 《Multiple purchase discount available》

[On sale June 7th at 10 PM] Limited to 10 stones: Flower-cut gem gacha 💎 Cherry blossom shape normally 39,800 yen, and a ruby with a new cut (plus an extra new cut) 《Multiple purchase discount available》
Sold out Zimbabwean Blue Apatite, UV Type, 1 Stone Loose {Multiple Purchase Discounts Available}

Zimbabwean Blue Apatite, UV Type, 1 Stone Loose {Multiple Purchase Discounts Available}
Sold out Limited to 6 stones: Brazilian Medusa Quartz (Paraiba Quartz) cat cut 1 stone loose (6mm) Multiple purchase discount available

Limited to 6 stones: Brazilian Medusa Quartz (Paraiba Quartz) cat cut 1 stone loose (6mm) Multiple purchase discount available
Sold out Limited to 5 stones: 1 Veracruz amethyst rough stone (from Mexico, February birthstone) Multiple purchase discount

Limited to 5 stones: 1 Veracruz amethyst rough stone (from Mexico, February birthstone) Multiple purchase discount
Sold out Limited to 5 stones: 1 colorless apatite loose stone from Madagascar (all stones come with identification certificate, average 0.40ct) Discounts for multiple purchases available

Limited to 5 stones: 1 colorless apatite loose stone from Madagascar (all stones come with identification certificate, average 0.40ct) Discounts for multiple purchases available
Sold out Limited to 5 stones: 1 Indian Iolite Sunstone (impregnated) loose stone (average 6.6 carats, cabochon cut) Multiple purchase discounts available

Limited to 5 stones: 1 Indian Iolite Sunstone (impregnated) loose stone (average 6.6 carats, cabochon cut) Multiple purchase discounts available
Sold out Limited to 4 stones: 1 Brazilian white topaz loose stone (average 2.1 carats) Multiple purchase discounts available

Limited to 4 stones: 1 Brazilian white topaz loose stone (average 2.1 carats) Multiple purchase discounts available
Sold out 1 Russian Alexandrite loose stone (round cut, 1.3-1.6mm) {Multiple purchase discount available}

1 Russian Alexandrite loose stone (round cut, 1.3-1.6mm) {Multiple purchase discount available}
Sold out Rainbow Garnet (Rose Cut, 3.0-5.5mm) from Tenkawa Village, Nara Prefecture, Single Loose Stone (Multiple Purchase Discounts Available)

Rainbow Garnet (Rose Cut, 3.0-5.5mm) from Tenkawa Village, Nara Prefecture, Single Loose Stone (Multiple Purchase Discounts Available)
Sold out Limited to 20 stones: Russian Demantoid Garnet (Round Cut, 2.0mm) Loose Stone (Multiple Purchase Discounts Available)

Limited to 20 stones: Russian Demantoid Garnet (Round Cut, 2.0mm) Loose Stone (Multiple Purchase Discounts Available)
Sold out November birthstone topaz gacha! Win an 8.16ct sky blue topaz from Koshu Kiriko (Sakura Kiriko) and more! (Multiple purchase discounts available)

November birthstone topaz gacha! Win an 8.16ct sky blue topaz from Koshu Kiriko (Sakura Kiriko) and more! (Multiple purchase discounts available)
Sold out Limited to 4 stones: Carving Gacha (pink tourmaline, average 3.4 carats) 1 loose stone (multiple purchase discounts available)

Limited to 4 stones: Carving Gacha (pink tourmaline, average 3.4 carats) 1 loose stone (multiple purchase discounts available)
Sold out Limited to 7 stones: Sri Lankan star sapphire (1 loose stone) Multiple purchase discounts available

Limited to 7 stones: Sri Lankan star sapphire (1 loose stone) Multiple purchase discounts available
Sold out 《Limited to 13 stones》Beryl Gacha (including Aquamarine Vortex Cut Koshu Kiseki Kiriko) 1 Loose Stone《Multi-purchase discount available》

《Limited to 13 stones》Beryl Gacha (including Aquamarine Vortex Cut Koshu Kiseki Kiriko) 1 Loose Stone《Multi-purchase discount available》
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 Limited to 11 stones! Includes Koshu Precious Stone Kiriko plusthree "Irodori," normally priced at 74,800 yen. Sphene Gacha. Multiple purchase discounts available.

Limited to 11 stones! Includes Koshu Precious Stone Kiriko plusthree "Irodori," normally priced at 74,800 yen. Sphene Gacha. Multiple purchase discounts available.
Sold out 《Limited to 4 stones》Kochi Prefecture Blood Red Coral Branch (Raw Wood) 1 stone (March birthstone, coral, average 7.2ct) 《Multiple purchase discount available》

《Limited to 4 stones》Kochi Prefecture Blood Red Coral Branch (Raw Wood) 1 stone (March birthstone, coral, average 7.2ct) 《Multiple purchase discount available》
Sold out [On Sale 5/30 at 10 PM] "Limited 9 Stones" Blue Gem Gacha 💎 Brazilian Paraiba Tourmaline (CuO: 2.2%, MnO: 3.5%), Top Color Benitoite, Hauyne, Apatite (Multi-purchase discount available)

[On Sale 5/30 at 10 PM] "Limited 9 Stones" Blue Gem Gacha 💎 Brazilian Paraiba Tourmaline (CuO: 2.2%, MnO: 3.5%), Top Color Benitoite, Hauyne, Apatite (Multi-purchase discount available)

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.