Width: 3.1 - 4.0mm

Tanzanian Kornerupine 0.201ct loose stone Sale price¥14,800

Tanzanian Kornerupine 0.200ct Loose Stone Sale price¥9,800

Colombian oil-free emerald 0.310ct loose stone Sale price¥298,000

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

Zoisite 0.216ct loose stone (heart shape) Sale price¥7,980

[On Sale June 7th, 10 PM] Andalusite from Spain, 0.582 ct loose stone Sale price¥7,980

[Sale on 5/17 at 10 PM] Cinnabar from Xinhua, Hunan Province, China, 1.056 ct Loose Stone with Gemological Report Sale price¥18,800

[Sale begins May 18th, 10 PM JST] Chinese Cinnabar (Hunan Province) 0.867ct Loose Stone with Certification Sale price¥13,800

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

[Sale at 10 PM on May 22] GGG (Gadolinium Gallium Garnet) 0.511 ct Loose Stone Sale price¥12,800

[On sale May 21st, 10 PM JST] Synthetic Alexandrite 0.228ct Loose Stone Sale price¥9,800

【Sale starts May 17th, 10 PM JST】Synthetic Alexandrite 0.414ct Loose Stone Sale price¥12,800

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

[For sale May 18, 10 PM JST] Spanish Cobalt Calcite 0.289ct Loose Stone with Certificate Sale price¥29,800

[Sale at 10 PM on May 18th] Spanish Cobalt Calcite 0.253ct Loose Stone with Certificate Sale price¥25,800

[On Sale May 2 at 10 PM] Ruby 0.286ct Loose Gemstone with Identification Report Sale price¥22,800

【32501908掲載】ブラウンダイヤモンド 0.290ctルース(FANCY BROWN, SI-2)

Loose Brown Diamond 0.290ct (FANCY BROWN, SI-2) Sale price¥15,800

Diamond 3.7mm/0.318ct Loose (F, SI-1, Princess Cut) Sale price¥49,800

Colombian emerald 0.499ct rough stone Sale price¥14,800

Väyrynenite from Pakistan, 0.146 ct, loose Sale price¥39,800

【32501899掲載】ダイヤモンド 0.167ctルース(G, VS-1, VeryGood)

[On sale May 3 at 10 PM] Diamond 3.5mm/0.167ct Loose Stone (G, VS-1, Very Good) Sale price¥29,800

[On sale 5/27 10 PM] Diamond 3.8mm/0.197ct Loose (E, VVS-1, VeryGood) Sale price¥39,800

【32501896掲載】ダイヤモンド 0.167ctルース(D, VVS-2, VeryGood)

[Sale on May 3rd, 10 PM JST] Diamond 3.5mm/0.167ct Loose Stone (D, VVS-2, VeryGood) Sale price¥37,800

[On sale May 27th at 10 PM] Diamond 3.8mm/0.211ct Loose (E, VS-2, Excellent) Sale price¥49,800

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

【32501891掲載】ダイヤモンド 0.207ctルース(F, VS-1, Excellent)

[On sale May 3rd, 10 PM JST] Loose Diamond 3.8mm/0.207ct (F, VS-1, Excellent) Sale price¥35,800

Brazilian Indicolite Tourmaline 0.352ct Loose Stone with Certification Sale price¥29,800

Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone Sale price¥18,800

0.186ct loose Bekily blue garnet (color-change garnet) from Madagascar Sale price¥18,800

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） 0.213ctルース

[Sale on May 18th at 10 PM] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.213ct Loose Stone Sale price¥22,800

Oregon Sunstone 0.272ct Loose Sale price¥6,980

Benitoite 0.231ct loose Sale price¥220,000

Benitoite 0.286ct loose Sale price¥258,000

Rhodochrosite from Detroit City, USA 3.1mm/0.154ct loose stone Sale price¥19,800

Rhodochrosite from Detroit City, USA 3.2mm/0.150ct loose stone Sale price¥19,800

Colombian emerald 0.345ct loose stone (silky type) Sale price¥15,800

カメレオンダイヤモンド 0.128ctルース(FANCY LIGHT GRAY GREEN, SI-1)

[Sale on May 9, 10 PM JST] Chameleon Diamond 3.2mm/0.128ct Loose Stone (FANCY LIGHT GRAY GREEN, SI-1) Sale price¥31,800

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

[Sale on May 5th at 10 PM] Tanzanian Spessartine Garnet 0.417ct Loose Gemstone Sale price¥12,800

Benitoite from the USA, 3.4mm/0.175ct loose Sale price¥98,000

Ceylon Blue Sapphire (Ice Blue) 0.289ct Loose Sale price¥9,800

[On sale May 5th at 10 PM JST] Madagascar Blue Sapphire 0.413ct Loose Gemstone Sale price¥15,800

[Sale begins May 5, 10 PM JST] Brazilian euclase 0.210ct loose stone with GIA certificate Sale price¥18,800

American Benitoite 0.242ct Loose Sale price¥158,000

Indonesian Parasitic Peridot 0.276ct Loose Stone Sale price¥98,000

Brazilian Dumortierite in Quartz 0.387ct loose stone Sale price¥3,980

Madagascar Pezzottaite 0.229ct loose stone Sale price¥15,800

【12562577掲載】ケニア産バイカラーグロッシュラーガーネット 0.790ctルース

Bi-color grossular garnet (bi-color tsavorite) from Kenya, 0.790 ct loose stone Sale price¥24,800

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.