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Sold out バイカラーゾイサイト 0.703ctルース

Tanzanian Bicolor Zoisite 5.5mm/0.703ct Loose Stone
Sold out パパラチアサファイア 0.376ctルース

Padparadscha Sapphire 0.376ct Loose Stone
Sold out パパラチアサファイア 0.251ctルース

Padparadscha Sapphire 0.251ct Loose Stone
Sold out ブラジル産ゴーシェナイト 1.611ctルース

Brazilian Goshenite 1.611ct loose stone
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.439ctルース

Rainbow Garnet (Andradite Garnet) 0.439ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.577ctルース

Rainbow Garnet (Andradite Garnet) 0.577ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out スペイン産バイカラースファレライト 0.727ctルース

0.727ct Bicolor Sphalerite Loose Stone from Spain
Sold out タンザニア産ペリステライト 0.458ctルース

Tanzanian Peristerite 5.1mm/0.458ct Loose Stone (Rose Cut)
Sold out タンザニア産ペリステライト 0.503ctルース

Tanzanian Peristerite 5.1mm/0.503ct Loose Stone (Rose Cut)
Sold out Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.131ct Loose Stone

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.131ct Loose Stone
Sold out Ruby 0.224ct loose

Ruby 0.224ct loose

Sold out Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate

Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate
Sold out Limited to 15 stones: Blue Stone Gacha (Top-Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) (Multiple purchase discounts available)

Limited to 15 stones: Blue Stone Gacha (Top-Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) (Multiple purchase discounts available)
Sold out K18YG ミャンマー産翡翠（ヒスイ） 0.434ct・エメラルドリング

18K Yellow Gold Myanmar Jadeite and Emerald 0.434ct Ring
Sold out K18YG カメレオンダイヤモンド 0.142ct リング

18K Yellow Gold Chameleon Diamond 3.2mm/0.142ct Ring (SI-2, Fancy Brownish Greenish Yellow)

Sold out K18YG アンデシン・ラブラドライト（通称名 ブルームーンストーン） 0.395ct リング

18K Yellow Gold Tanzanian Andesine Labradorite (also known as Blue Moonstone) 6.0mm/0.395ct Benitoa Ring

Sold out Pt950 バイカラーサファイア 0.398ct リング

Pt950 Madagascar Color Change Sapphire (Bicolor Sapphire) 0.398ct Ring

Sold out インターナリーダイヤモンド 0.25ルース(E, IF, 3Excellent) GIA

Internal Diamond 4.1mm/0.250ct Loose (F, IF, 3 Excellent) GIA
Sold out ブラジル産ルベライト 2.588ctルース

Brazilian Rubellite 2.588ct Loose Stone

Sold out ブラジル産レインボーアクアマリン 2.698ctルース

Brazilian Rainbow Aquamarine (Iridescent Aquamarine) 2.698ct Loose Stone
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.231ct loose stone

Brazilian unheated pink imperial topaz (sherry pink) 0.231ct loose stone

Sold out ピジョンブラッドルビー 3.7mm/0.230ctルース AIGS

Pigeon Blood Ruby 3.7mm/0.230ct Loose Stone AIGS

Sold out パキスタン産ヴェイリネナイト 0.145ctルース 鑑別書

Pakistani Veirinite 0.145ct Loose Stone with Certificate of Authenticity

Sold out 非加熱ロイヤルブルーサファイア 0.640ctルース AIGS

Unheated Royal Blue Sapphire 0.640ct Loose AIGS

Sold out ラボグロウンダイヤモンド（合成ダイヤモンド） 0.290ctルース(FANCY VIVID PINK, VS-2)

Lab-grown Diamond (Synthetic Diamond) 0.290ct Loose (FANCY VIVID PINK, VS-2)

Sold out Limited to 7 stones: One loose, oil-free Russian emerald (1.5-1.6mm, step cut) [Multiple purchase discounts available]

Limited to 7 stones: One loose, oil-free Russian emerald (1.5-1.6mm, step cut) [Multiple purchase discounts available]

Sold out "Purple Sun Night" Ice Blue Sapphire, Amethyst, Bekiri Blue Garnet, and Tanzanite 13-Stone Half Eternity Ring Set (2.0mm)

"Purple Sun Night" Ice Blue Sapphire, Amethyst, Bekiri Blue Garnet, and Tanzanite 13-Stone Half Eternity Ring Set (2.0mm)

Sold out ペルー産バイカラーブルーオパール 0.492ctルース

Peruvian bicolor blue opal 0.492ct loose stone

Sold out K18YG マダガスカル産スフェーン 0.597ct ペンダントトップ（ネックレストップ）

18K Yellow Gold Madagascar Sphene 0.597ct Pendant (Necklace)
Sold out Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Sold out Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Sold out Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (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 Pt900 Ice Blue Diamond 0.333ct 0.333ct Akoya Pearl 8.0mm Earrings

Pt900 Ice Blue Diamond 0.333ct 0.333ct Akoya Pearl 8.0mm Earrings
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） 4.868ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 4.868ct Loose Stone

Sold out Limited to 15 stones: One loose, unheated silky pink sapphire from Vietnam (2.5mm, round cut) [Multiple purchase discounts available]

Limited to 15 stones: One loose, unheated silky pink sapphire from Vietnam (2.5mm, round cut) [Multiple purchase discounts available]

Sold out Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]

Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]
Sold out One loose, oil-free emerald from Russia (2.8mm, round cut) (Multiple purchase discounts available)

One loose, oil-free emerald from Russia (2.8mm, round cut) (Multiple purchase discounts available)
Sold out Limited Edition of 11 Rare Stones! 💎 Two 0.23ct Paraiba Tourmalines from Batalha, Brazil, a Pink Diamond, and a Benitoite Loose Stone. Discounts available for multiple purchases.

Limited Edition of 11 Rare Stones! 💎 Two 0.23ct Paraiba Tourmalines from Batalha, Brazil, a Pink Diamond, and a Benitoite Loose Stone. Discounts available for multiple purchases.
Sold out Limited Edition of 10 Bicolor Gacha! 💎 Includes two Zimbabwean euclase stones (average 0.088ct), a 1.03ct bicolor sapphire, a bicolor chrysoberyl, and more. Discounts available for multiple purchases.

Limited Edition of 10 Bicolor Gacha! 💎 Includes two Zimbabwean euclase stones (average 0.088ct), a 1.03ct bicolor sapphire, a bicolor chrysoberyl, and more. Discounts available for multiple purchases.
Sold out Tanzanian Malaya Garnet 0.569ct Loose Stone

Tanzanian Malaya Garnet 0.569ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.036ctルース

Russian Demantoid Garnet (Horsetail) 0.036ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.061ctルース

Russian Demantoid Garnet (Horsetail) 0.061ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.064ctルース

Russian Demantoid Garnet (Horsetail) 0.064ct Loose Stone
Sold out Chinese Cinnabar (Cinnabar) 0.811ct Loose Stone with Certificate of Authenticity

Chinese Cinnabar (Cinnabar) 0.811ct Loose Stone with Certificate of Authenticity
Sold out 中国産辰砂（シンシャ・シナバー）0.884ctルース（ファセットカット） 鑑別書

Chinese Cinnabar (Xinsha/Cinnabar) 0.884ct Loose Stone (Faceted) with Certificate of Authenticity
Sold out 中国産シンシャ（辰砂・シナバー） 1.035ctルース

Chinese Cinnabar (Cinnabar) 1.035ct Loose Stone

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.