Coming soon

フローレスダイヤモンド（H&C） 0.210ctルース(D, FL, 3Excellent H&C)

[On sale May 12, 10 PM JST] Flawless Diamond (H&C) 3.8mm/0.210ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥148,000

フローレスダイヤモンド（H&C） 0.230ctルース(D, FL, 3Excellent H&C)

[On sale May 12, 10 PM JST] Flawless Diamond (H&C) 4.0mm/0.230ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL Sale price¥158,000

インターナリーフローレスダイヤモンド 0.300ctルース(F, IF, 3Excellent)

[Sale on May 12th at 10 PM] Internally Flawless Diamond 4.3mm/0.300ct Loose (F, IF, 3Excellent) GIA Sale price¥98,000

インターナリーフローレスダイヤモンド（H&C） 0.360ctルース(D, IF, 3Excellent H&C)

[On sale May 12th, 10 PM JST] Internally Flawless Diamond (H&C) 4.5mm/0.360ct Loose Stone (D, IF, 3Excellent H&C) GIA & CBT Sale price¥188,000

[On sale May 10th, 10 PM] Scheelite from Sichuan Province, China 1.066ct Loose Stone with Certification Sale price¥39,800

[On sale May 10, 10 PM JST] Unheated Sri Lankan Star Sapphire 0.710ct Loose Stone Sale price¥8,800

[On sale May 10th at 10 PM] Tanzanian Spessartine Garnet 0.359ct Loose Stone Sale price¥9,800

[On sale May 10th at 10 PM] Sri Lankan Bi-Color Sapphire 0.302ct Loose Stone Sale price¥11,000

[12562802 posted] Chinese Cinnabar (Shansha) 0.935 ct Loose Sale price¥15,800

[On sale May 11th at 10 PM] Bi-color Euclase from Zimbabwe, 0.152ct loose stone Sale price¥29,800

[On sale May 11, 10 PM JST] Unheated Sri Lankan Star Sapphire 0.737ct Loose Stone Sale price¥9,800

[On sale May 12, 10 PM JST] Tanzanian Lavender Tanzanite 1.415ct Loose Stone Sale price¥45,800

[On sale May 12th at 10 PM] Tanzanian Tanzanite 4.1mm/0.295ct Loose Gemstone Sale price¥9,800

[On sale May 12th, 10 PM JST] Mexican Fire Opal (Faceted) 1.046ct Loose Stone Sale price¥29,800

[On Sale May 12th at 10 PM] Bi-Color Grossular Garnet from Tanzania, 2.057 ct, Loose Stone Sale price¥55,800

[Sale starts May 14th, 10 PM JST] [Colorfuri] Pt900 German Hauyne 0.065ct Pendant Top (Necklace Top) with Certificate Sale price¥39,800

Pt900 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） 0.5ct ペンダントトップ（ネックレストップ）

[Sale on May 14 at 10 PM] [Colorful] Pt900 Andesine/Labradorite (commonly known as Rainbow Moonstone) 0.5ct Pendant Top (Necklace Top) with Identification Report Sale price¥18,800

[On sale May 13th at 10 PM] Brazilian Limonite in Topaz 7.141ct Loose Gemstone Sale price¥19,800

Almandine garnet 2.964ct loose Sale price¥12,800

[Rouge cut] Almandine garnet 3.214ct loose Sale price¥15,800

[Rouge cut] Almandine garnet 2.661ct loose Sale price¥12,800

[On sale May 15th, 10 PM JST] Brazilian Lazulite (0.052ct Loose Stone) with Certification Sale price¥32,800

[On sale May 13 at 10 PM] Australian Black Opal 0.525ct Loose Stone Sale price¥12,800

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） 0.082ctルース

[On sale May 12th at 10 PM] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.082ct Loose Stone Sale price¥8,800

【Sales start 5/13 10 PM JST】Sri Lankan Bi-Color Sapphire, 0.434 ct Loose Stone Sale price¥12,800

[On sale May 14 at 10 PM] Colorful WISH UPON A STAR® 3.5mm/0.166ct/F/VS1 Diamond with Certificate Sale price¥39,800

[On Sale May 14th, 10 PM] Diamond 3.8mm/0.216ct Loose (G, VS-1, Excellent) Sale price¥49,800

[On Sale May 14th at 10 PM] Colombian Emerald 0.689ct Loose Stone Sale price¥18,800

[On sale May 14 at 10 PM] Nigerian Cobalt-bearing Gahnite 0.572ct Loose Stone with Certificate Sale price¥69,800

【On sale May 15 at 10 PM】Sri Lankan Chrysoberyl Cat's Eye 4.5mm/0.419ct Loose Stone Sale price¥15,800

[On sale May 15, 10 PM JST] Chinese Cinnabar from Hunan Province, 0.842ct Loose Stone with Certificate Sale price¥15,800

Mozambique Pink Sapphire 0.276ct Loose (Hot Pink Sapphire) Sale price¥9,800

Goshenite 6.1mm/0.905ct loose stone Sale price¥7,980

Purple Spinel 4.3mm/0.323ct Loose Stone Sale price¥6,980

Pink tourmaline 6.1mm/1.031ct loose stone Sale price¥12,800

Violet spinel 0.301ct loose Sale price¥6,980

Pink tourmaline 0.466ct loose Sale price¥8,800

Tanzania Zoisite 0.278ct loose stone Sale price¥7,980

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） 3.251ctルース

Andesine Labradorite (also known as Rainbow Moonstone) 7.7mm/3.251ct Loose Stone (Sphere) Sale price¥29,800

Brazilian alexandrite 0.061ct loose Sale price¥12,800

Brazilian alexandrite 0.058ct loose Sale price¥11,000

Brazilian alexandrite 0.060ct loose Sale price¥11,000

Brazilian alexandrite 0.051ct loose Sale price¥9,800

Salt and pepper diamond 0.446ct loose Sale price¥39,800

[Sale on May 17th at 10 PM] [Colorful] K18 Ruby 0.33ct and Diamond Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥69,800

[Sale from 10 PM on May 17th] [Colorful] K18WG Diamond 0.21ct Pendant Top (Necklace) Sale price¥49,800

[On Sale May 16th, 10 PM JST] Brazilian Emerald Cat's Eye 1.022ct Loose Stone with Certification Sale price¥12,800

[On Sale May 16th, 10 PM JST] Brazilian Emerald Cat's Eye 0.459 ct Loose Gemstone with Certificate Sale price¥9,800

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.