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Tanzanian bicolor tanzanite 0.573ct loose stone Sale price¥12,800

Tanzanian Lavender Tanzanite 0.558ct Loose Stone Sale price¥12,800

Brazilian Dendritic Agate 3.575ct Loose Stone Sale price¥8,800

Brazilian Dendritic Agate 2.788ct Loose Stone Sale price¥6,980

Brazilian Dendritic Agate 1.679ct Loose Stone Sale price¥5,980

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

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

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

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

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

インターナリーフローレスダイヤモンド 0.217ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥88,000

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

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

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

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

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

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

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

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

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

[On sale July 5th at 10 PM] Madagascar Padparadscha Sapphire 4.5mm/0.416ct Loose Stone with Chubo Certification Sale price¥98,000

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

[Sales start July 5, 10 PM JST] Madagascar Padparadscha Sapphire 3.3mm/0.156ct Loose Stone - Central Gem Laboratory certified Sale price¥29,800

[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] 0.566ct Loose Tanzanian Mahenge Spinel (Pink Spinel) with identification Sale price¥55,800

Sold out

【Sales start: July 10, 10 PM JST】Madagascar Sapphire 0.553ct Loose Gemstone with Identification Report

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

[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] Tanzanian Windsor Sapphire (Brown Sapphire) 1.137ct Loose Stone with Certificate Sale price¥49,800

[On sale July 9th, 10 PM JST] Tanzanian Windsor Sapphire (Purple Sapphire) 0.393ct Loose Stone with Certificate Sale price¥18,800

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

[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

[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 5th at 10 PM] Sri Lankan Blue Sapphire, 0.550 ct Loose Stone with Gemstone Report Sale price¥39,800

coming soon

[Listed as 12562154] Brazilian Dumortierite in Quartz 1.729ct Loose 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） 1.967ctルース

[Sale July 6th at 10 PM] Brazilian Tinker Bell Quartz (Pink Fire Quartz) 1.967ct Loose Stone Sale price¥14,800

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

[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

[On Sale July 9 at 10 PM JST] Brazilian Tinkerbell Quartz (Pink Fire Quartz) 11mm/4.823ct Loose Stone Sale price¥25,800

[On sale July 5th, 10 PM JST] Brazilian Blue Tourmaline in Quartz 10.466ct Loose Stone Sale price¥39,800

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

[On sale July 4th at 10 PM] Brazilian Dumortierite in Quartz, 1.290ct Loose Stone Sale price¥12,800

[On sale July 4th at 10 PM] Brazilian Dumortierite in Quartz, 1.349ct Loose Stone Sale price¥12,800

[On sale July 4, 10 PM] 0.416 ct Loose Mozambique Ruby with Certificate Sale price¥29,800

[On sale 7/9 at 10 PM] Brazilian Santa Maria Aquamarine Loose Stone 0.188ct with certification Sale price¥25,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.103 ct loose stone, with certificate Sale price¥25,800

Paraiba tourmaline from Brazil 0.056ct loose Sale price¥45,800

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.