Product list

[On Sale July 6, 10 PM] Brazilian Blue Tourmaline in Quartz 4.241ct Loose Stone Sale price¥19,800

[On sale July 9th at 10 PM JST] Brazilian Black Garden Quartz Loose Stone 5.030ct Sale price¥12,800

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） 4.823ctルース

Pink Fire Quartz (Tinkerbell Quartz) from Brazil, 11mm/4.823ct loose stone Sale price¥25,800

[On sale July 24 at 10 PM JST] Brazilian Dumortierite in Quartz 7.3mm/1.729ct Loose Stone Sale price¥12,800

[On sale July 12th at 10 PM] Synthetic Rutile 4.3mm/0.447ct Loose Gemstone Sale price¥12,800

Sri Lankan Blue Sapphire 0.550ct Loose Stone with Gem Identification Report Sale price¥39,800

[Sale starts July 6th at 10 PM] Sri Lankan Blue Sapphire 4.0mm/0.269ct Loose Stone with Appraisal Sale price¥29,800

[On sale July 5, 10 PM] Sri Lankan orange sapphire 0.654ct loose stone with gemological report Sale price¥29,800

[On sale July 6th at 10 PM] Sri Lankan Yellow Sapphire 0.815ct Loose Stone with Certification Sale price¥15,800

[On Sale July 5 at 10 PM JST] Madagascar Grandidierite 2.5mm/0.065ct Loose Stone with Certification Sale price¥15,800

0.393ct Loose Tanzanian Windsor Sapphire (Purple Sapphire) with Gemstone Identification Report Sale price¥18,800

Tanzanian Mahenge Spinel (Pink Spinel) 0.566ct Loose Stone with Certification Sale price¥55,800

[On Sale July 10 at 10 PM JST] Tanzanian Mahenge Spinel (Pink Spinel) 0.333ct Loose Stone with Gemological Report Sale price¥29,800

[On sale July 5th at 10 PM] Colombian Emerald 0.147ct Loose Stone with Appraisal Sale price¥12,800

[On sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.167ct Loose Gemstone with Certificate Sale price¥24,800

[On Sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.158ct Loose Stone with Appraisal Sale price¥18,800

Madagascar padparadscha sapphire 3.3mm/0.156ct loose stone (with CGL certificate) Sale price¥29,800

Madagascar Padparadscha Sapphire 4.5mm/0.416ct Loose Gemstone, Central Gemology Laboratory certified Sale price¥98,000

Pomme Blanche "Semi-custom ring setting" Sale priceFrom ¥105,800

[On sale July 24 at 10 PM] Kochi Prefecture produced "blood red" coral loose stone, 7.815ct Sale price¥42,800

[Sale on 7/15 at 10 PM] Kochi Prefecture Red Coral 1.593ct Loose Stone Sale price¥9,800

[On sale 7/22 10 PM JST] 1.585ct Blood Red Coral Loose Stone from Kochi Prefecture Sale price¥9,800

[On Sale July 22nd at 10 PM] Kochi Prefecture Blood Coral 10.209ct Loose Stone Sale price¥29,800

【Sales start July 22nd, 10 PM JST】Malawi Moonstone 2.114ct Loose Stone Sale price¥12,800

[Sale on 7/22 at 10 PM] Malawi Moonstone 1.748ct Loose Gemstone Sale price¥9,800

[On sale July 22nd at 10 PM] Malawi Moonstone 2.001ct Loose Gemstone Sale price¥12,800

[On sale July 24 at 10 PM] Malawi Moonstone (Malawi Moonstone) 1.626 ct loose gemstone Sale price¥9,800

[On sale 7/24 at 10 PM] Malawi Moonstone 1.621ct Loose Stone Sale price¥9,800

[On sale July 24 at 10 PM] Malawi Moonstone 1.684ct Loose Gemstone Sale price¥9,800

[On sale 7/24 10 PM] Malawi Moonstone 1.939ct Loose Gemstone Sale price¥12,800

【Sales start: August 3rd, 10 PM JST】Malawi Moonstone 2.283 ct Loose Gemstone Sale price¥12,800

[On sale 8/3 at 10 PM] Malawi Moonstone 1.747ct Loose Gemstone Sale price¥9,800

[On sale August 3rd at 10 PM] Malawi Moonstone 2.183ct Loose Stone Sale price¥12,800

[Listed on 22602645] [Colorful] Pt900 Ruby 0.6ct Ring Sale price¥98,000

[Posted on 22602644] [Calafri] K18 Synthetic Sapphire Ring Sale price¥45,800

Pt950 ムーンストーンキャッツアイ 1.5ct ペンダントトップ（ネックレストップ）鑑別書

[Published on 22602643] [CALAFULI] Pt950 Moonstone Cat's Eye 1.5ct Pendant Top Sale price¥45,800

Pt950 ムーンストーンキャッツアイ 3ct ・ムーンストーンキャッツアイリング鑑別書

[Listed as 22602642][Colorful] Pt950 Moonstone Cat's Eye 3ct Ring Sale price¥79,800

K18WG ルビー 0.94ct・ダイヤモンド0.66ctペンダントトップ（ネックレストップ）　鑑別書

[Published on 22602611] [Carafur] K18WG Ruby 0.94ct Pendant Top (Necklace Top) Sale price¥158,000

Pt900 ブルーサファイア 0.43ct・ダイヤモンド0.44ctリング鑑別書

[Item ID: 22602630] [Karafuri] Pt900 Blue Sapphire 0.43ct Ring Sale price¥98,000

K18 ペリステライト 0.66ct・ダイヤモンドペンダントトップ（ネックレストップ）鑑別書

[22602614 Listed] [Calafli] K18 Peristerite 0.66ct Pendant Top (Necklace Top) Sale price¥29,800

インターナリーフローレスダイヤモンド（H&C） 5.1mm/0.527ctルース(E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C) Sale price¥228,000

インターナリーフローレスダイヤモンド 0.272ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000

Diamond loose/certificate transfer fee Sale price¥8,800

Brazilian Euclase 0.289ct loose stone Sale price¥12,800

Brazilian Euclase 0.263ct Loose Stone (Colorless Euclase) Sale price¥9,800

Brazilian Euclase 0.695ct Loose Stone Sale price¥18,800

Synthetic Alexandrite 0.287ct loose stone Sale price¥8,800

Brazilian Dendritic Agate 1.679ct 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.