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[Restock on June 27th at 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1: The Big Five Gems

[Restock on June 27th at 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1: The Big Five Gems Sale price¥660
[Sale starts 6/5 at 10 PM JST] 《Limited to 25 sets》Kochi Prefecture Red Coral Branch (Raw Wood) and 2 Loose Stones Set (March Birthstone, Coral) 《Multiple Purchase Discount Available》

[Sale starts 6/5 at 10 PM JST] 《Limited to 25 sets》Kochi Prefecture Red Coral Branch (Raw Wood) and 2 Loose Stones Set (March Birthstone, Coral) 《Multiple Purchase Discount Available》 Sale price¥6,980
[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" Sale price¥6,980
[On Sale June 6th, 10 PM JST] 11-Piece Limited Edition Madagascar Sapphire Gacha (Including bi-color and silky varieties, 3.5-5.4mm) [Multi-buy discount available]

[On Sale June 6th, 10 PM JST] 11-Piece Limited Edition Madagascar Sapphire Gacha (Including bi-color and silky varieties, 3.5-5.4mm) [Multi-buy discount available] Sale price¥4,980
Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available

Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available Sale price¥3,980
[On sale June 21st at 10 PM] Ruby Gacha (with synthetic ruby as a bonus) including two pigeon blood rubies with appraisal certificates (limited to 15 stones) - Multiple purchase discount available

[On sale June 21st at 10 PM] Ruby Gacha (with synthetic ruby as a bonus) including two pigeon blood rubies with appraisal certificates (limited to 15 stones) - Multiple purchase discount available Sale price¥5,980
【Available 10 PM on 6/7】《Limited to 10 Stones》Zircon Gacha including a rare Malawi bicolor zircon, usually priced at 29,800 yen 《Multiple Purchase Discount Available》

【Available 10 PM on 6/7】《Limited to 10 Stones》Zircon Gacha including a rare Malawi bicolor zircon, usually priced at 29,800 yen 《Multiple Purchase Discount Available》 Sale price¥4,980
[On Sale June 6th]《Limited to 9 Stones》Brazilian Amethyst Single Stone Loose (Includes Elestial and Bi-Color Amethyst)《Bulk Purchase Discount Available》

[On Sale June 6th]《Limited to 9 Stones》Brazilian Amethyst Single Stone Loose (Includes Elestial and Bi-Color Amethyst)《Bulk Purchase Discount Available》 Sale price¥3,980
【Sale starts June 19th, 10 PM】《Limited to 10 stones》Madagascar Andesine-Labradorite (Rainbow Moonstone) Gacha, 1 Loose Stone (Avg. 0.40ct)《Multiple Purchase Discount Available》

【Sale starts June 19th, 10 PM】《Limited to 10 stones》Madagascar Andesine-Labradorite (Rainbow Moonstone) Gacha, 1 Loose Stone (Avg. 0.40ct)《Multiple Purchase Discount Available》 Sale price¥2,980
Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available}

Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available} Sale price¥2,980
[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available)

[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available) Sale price¥7,980
[Sales begin 6/20 10 PM] Limited to 12 Stones: Madagascar Andesine & Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct) - Multiple Purchase Discount Available

[Sales begin 6/20 10 PM] Limited to 12 Stones: Madagascar Andesine & Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct) - Multiple Purchase Discount Available Sale price¥3,980
[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available]

[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available] Sale price¥5,980
[On sale June 28th at 10 PM] Brazilian Paraiba Tourmaline Gacha with sorting results (CuO: 2.1%, MnO: 2.2%), usually ¥45,800, now with a chance to win one of 18 limited stones. (Multiple purchase discount available)

[On sale June 28th at 10 PM] Brazilian Paraiba Tourmaline Gacha with sorting results (CuO: 2.1%, MnO: 2.2%), usually ¥45,800, now with a chance to win one of 18 limited stones. (Multiple purchase discount available) Sale price¥9,800
[On Sale June 7th, 10 PM] Limited to 15 Stones: Afghan Pink Diaspore Single Stone Loose Gemstone (Avg. 0.3ct) - Multiple Purchase Discount Available

[On Sale June 7th, 10 PM] Limited to 15 Stones: Afghan Pink Diaspore Single Stone Loose Gemstone (Avg. 0.3ct) - Multiple Purchase Discount Available Sale price¥3,980
[On sale June 8th, 10 PM JST] 《Limited to 4 stones》Needle-in-Blue Topaz Gacha💎Average 45ct《Multiple purchase discount available》

[On sale June 8th, 10 PM JST] 《Limited to 4 stones》Needle-in-Blue Topaz Gacha💎Average 45ct《Multiple purchase discount available》 Sale price¥9,800
[On sale June 19th at 10 PM] "Limited 7 Stones" Anthill Garnet Single Loose Stone (Oval Cut, approx. 4x3mm) "Multiple Purchase Discount Available"

[On sale June 19th at 10 PM] "Limited 7 Stones" Anthill Garnet Single Loose Stone (Oval Cut, approx. 4x3mm) "Multiple Purchase Discount Available" Sale price¥3,980
[Sales begin 10 PM JST on 6/21] Dragon Garnet Single Loose Stone (Round Cut, 5mm) - Limited to 5 Stones - Multi-Purchase Discount Available

[Sales begin 10 PM JST on 6/21] Dragon Garnet Single Loose Stone (Round Cut, 5mm) - Limited to 5 Stones - Multi-Purchase Discount Available Sale price¥8,800
[On sale June 20 at 10 PM] Limited to 5 Stones: Cambodian Ratanakiri Blue Zircon Gacha (Avg. 0.73ct) (Bulk Purchase Discount Available)

[On sale June 20 at 10 PM] Limited to 5 Stones: Cambodian Ratanakiri Blue Zircon Gacha (Avg. 0.73ct) (Bulk Purchase Discount Available) Sale price¥6,980
[Sale on June 19th at 10 PM] "Limited to 20 pieces" Kochi Prefecture Blood Coral Branch (raw, unworked) 1 piece (March birthstone, coral, average 5.8ct) "Discounts for multiple purchases available"

[Sale on June 19th at 10 PM] "Limited to 20 pieces" Kochi Prefecture Blood Coral Branch (raw, unworked) 1 piece (March birthstone, coral, average 5.8ct) "Discounts for multiple purchases available" Sale price¥6,980
[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available"

[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available" Sale price¥2,980
バイカラーサファイア 1.040ctルース

[On sale June 8th, 10 PM] Bi-Color Sapphire 1.040 ct Loose Gemstone GIT Sale price¥29,800
マダガスカル産パパラチアサファイア 0.336ctルース

[On sale June 7th at 10 PM] Madagascar Padparadscha Sapphire 3.9mm/0.336ct Loose Stone DGL Certified Sale price¥45,800
マダガスカル産パパラチアサファイア 0.282ctルース

[On sale June 7th at 10 PM] Madagascar Padparadscha Sapphire 3.9mm/0.282ct Loose Stone, DGL Certified Sale price¥43,800
ナイジェリア産コバルトガーナイト 0.154ctルース

[Sale on June 7 at 10 PM] Nigerian Cobaltian Garnet 0.154ct Loose Gemstone with Certificate Sale price¥24,800
ナイジェリア産コバルトガーナイト 0.157ctルース

【On sale June 7, 10 PM JST】Nigerian Cobalt Hauyne 0.157ct Loose with Certificate Sale price¥22,800
ナイジェリア産コバルトガーナイト 0.158ctルース

[On sale June 7th, 10 PM] Nigerian Cobalt-bearing Gahnite, 0.158ct loose stone with gemological report Sale price¥22,800
Pt900 ブルーサファイア 1.05ct・ダイヤモンド0.05ctリング 鑑別書

[On sale June 20th at 10 PM] Colorful Pt900 Blue Sapphire 1.05ct/Diamond 0.05ct Ring with Appraisal Report Sale price¥98,000
Pt900 ブルーサファイア 2.38ct・ダイヤモンド0.20ctリング 鑑別書

[On sale 6/25 10 PM] [COLORFUL] Pt900 Blue Sapphire 2.38ct and Diamond 0.20ct Ring with Appraisal Report Sale price¥198,000
Pt900/K18 ダイヤモンド 0.22ctリング 鑑別書

[On Sale June 20, 10 PM JST] [Colorfuri] Pt900/K18 Diamond 0.22ct Ring with Certificate Sale price¥98,000
K18 ロードクロサイト 0.77ct リング 鑑別書

[Sales start June 20th at 10 PM JST] [Colorfuri] K18 Rhodochrosite 0.77ct Ring with Certificate Sale price¥39,800
K18 アコヤパール・ダイヤモンド0.08ct リング 鑑別書

[Sale from 10 PM on June 18th] [Colorful] K18 Akoya Pearl and Diamond 0.08ct Ring with Certificate Sale price¥49,800
オレゴンサンストーン 0.462ctルース

Oregon Sunstone 0.462ct loose Sale price¥5,980
ピンクトルマリン 0.539ctルース

Pink tourmaline 0.539ct loose stone (heart shape) Sale price¥9,800
ピンクトルマリン 0.819ctルース

Pink tourmaline 0.819ct loose Sale price¥9,800
バイカラートルマリン 0.378ctルース

Bicolor Tourmaline 0.378ct Loose Stone (Hexagonal Cut) Sale price¥8,800
バイカラートルマリン 0.429ctルース

Bicolor tourmaline 0.429ct loose Sale price¥5,980
バイカラートルマリン 1.329ctルース

Bicolor tourmaline 1.329ct loose Sale price¥9,800
レピドクロサイトインクォーツ 0.532ctルース

Lepidocrocite in quartz 0.532ct loose Sale price¥6,980
American red beryl 0.143ct loose

American red beryl 0.143ct loose Sale price¥35,800
マダガスカル産ラブラドライト 0.823ctルース

[Sales start 10 PM on 6/6] Madagascar Labradorite 0.823ct Loose Gemstone Sale price¥7,980
K18WG ダイヤモンド ペンダントトップ（ネックレストップ）

[Available June 18th at 10 PM] [Colorful] K18WG Diamond 1.03ct Pendant Top Sale price¥128,000
モザンビーク産ピンクトルマリン 2.944ctルース

[12550851] 2.944ct Mozambique pink tourmaline loose stone Sale price¥39,800
ベリルキャッツアイ 32.703ctルース

[12552038] Beryl Cat's Eye 32.703ct Loose Stone Sale price¥98,000
スファレライト 3.980ctルース

Spanish Sphalerite 9.2mm/3.980ct loose stone Sale price¥49,800
タンザニア産ゾイサイト 0.203ctルース

[12550865] 0.203ct loose zoisite from Tanzania Sale price¥5,980
スリランカ産アイオライト 14.158ctルース 日独鑑

[12552306] Iolite 14.158ct loose stone Sale price¥258,000
雲母インクォーツ 0.758ctルース

Mica in Quartz 0.758ct Loose Stone Sale price¥5,980

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.