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ブラジル産サンタマリアアクアマリン 0.348ctルース

【Listed as 12562263】Brazilian Santa Maria Aquamarine 0.348ct Loose Gemstone Sale price¥12,800
ブラジル産ダイオプテーズ 0.894ctルース

[12563388 listed] Dioptase from Brazil, 0.894ct loose stone Sale price¥22,800
[On sale August 21st, 10 PM] "Limited to 20 stones" Sri Lankan Ratnapura Green Zircon Single Stone Loose Gemstone "Bulk purchase discount available"

[On sale August 21st, 10 PM] "Limited to 20 stones" Sri Lankan Ratnapura Green Zircon Single Stone Loose Gemstone "Bulk purchase discount available" Sale price¥3,980
ジンバブエ産ユークレース 0.083ctルース

[12563370 listed] Eucrite from Zimbabwe 0.083ct Loose Sale price¥18,800
タンザニア産バイカラーグロッシュラーガーネット 0.801ctルース

[Listed as 12563455] Tanzanian Bi-color Grossular Garnet 0.801 ct Loose Stone Sale price¥19,800
タンザニア産レッドスピネル 0.177ctルース

【12563732 Posted】Tanzanian Red Spinel 0.177ct Loose Sale price¥35,800
ブラジル産バイカラートルマリン 1.153ctルース

[12563744 listed] Bi-color Tourmaline from Brazil 1.153ct Loose Stone Sale price¥12,800
アフガニスタン産グリーンアウイナイト 0.269ctルース

[Listing 12563877] Afghan Green Hauyne 0.269ct Loose Sale price¥98,000
コロンビア産パイライト・雲母インエメラルド 0.409ctルース 鑑別書

[Featured on 12563911] Colombian Pyrite and Mica in Emerald, 0.409ct Loose Gemstone Sale price¥32,800
ブラジル産アパタイトキャッツアイ 2.219ctルース

[On sale 8/23 10 PM JST] Brazilian Rio Grande do Norte Apatite Cat's Eye 7.0mm/ 2.219ct Loose Stone with Appraisal Sale price¥22,800
ブラジル産アパタイトキャッツアイ 1.782ctルース

[Sales start August 23rd at 10 PM] Brazilian Rio Grande do Norte Apatite Cat's Eye 1.782ct Loose Stone with Certificate Sale price¥25,800
ブラジル産アパタイトキャッツアイ 1.295ctルース

[On sale August 23rd at 10 PM] Apatite Cat's Eye from Rio Grande do Norte, Brazil, 1.295ct Loose Stone with Certificate Sale price¥19,800
ブラジル産アパタイトキャッツアイ 0.740ctルース

[On sale 8/23 10 PM JST] Brazilian Apatite Cat's Eye from Rio Grande do Norte, 5.0mm/0.740ct Loose Stone with Certificate Sale price¥14,800
旧チェコスロバキア産モルダバイト 2.296ctルース

[Sale on August 23rd at 10 PM] Moldavite from former Czechoslovakia 9.1mm/2.296ct Loose Stone with Certificate Sale price¥32,800
旧チェコスロバキア産モルダバイト 2.091ctルース

[Sale on August 23rd at 10 PM] Old Czechoslovakia Moldavite 2.091ct Loose Stone with Certificate Sale price¥29,800
旧チェコスロバキア産モルダバイト 1.817ctルース

[On sale August 23rd at 10 PM] Old Czechoslovakia Moldavite 1.817ct Loose Stone with Certificate of Authenticity Sale price¥24,800
旧チェコスロバキア産モルダバイト 1.786ctルース

[Sale on August 23 at 10 PM] Old Czechoslovakia Moldavite 1.786ct Loose Stone with Certificate Sale price¥22,800
旧チェコスロバキア産モルダバイト 2.265ctルース

【Sales start 8/28 10 PM JST】Moldavite Loose Stone 2.265ct from former Czechoslovakia with Certificate Sale price¥29,800
カンボジア産ブルージルコン（ラタナキリブルー） 0.515ctルース

[On sale August 28th, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.515ct Loose Gemstone with Certificate Sale price¥14,800
カンボジア産ブルージルコン（ラタナキリブルー） 0.431ctルース

[Sale begins 8/28 at 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.431ct Loose Stone with Certification Sale price¥12,800
ナイジェリア産インディゴライトトルマリン 0.340ctルース

[On sale August 28, 10 PM] Nigerian Indicolite Tourmaline 0.340ct Loose Stone with Certificate Sale price¥29,800
ナイジェリア産インディゴライトトルマリン 0.242ctルース

[Sale on 8/28 at 10 PM] Nigerian Indicolite Tourmaline 0.242 ct Loose Stone with Certificate Sale price¥22,800
タンザニア産スピネル 1.154ctルース

[Posted on 12564182] Tanzanian Spinel 1.154ct Loose Gemstone Sale price¥39,800
タンザニア産スピネル 1.117ctルース

[Posted 12564181] Tanzanian Spinel 1.117ct Loose Stone Sale price¥39,800
ブラジル産インディゴライトトルマリン 0.389ctルース

[Listed as 12563729] Brazilian Indicolite Tourmaline 0.389ct Loose Sale price¥38,800
高知県産血赤珊瑚 4.627ctルース

Kochi Prefecture Aka Coral 4.627ct Loose Gemstone Sale price¥22,800
スリランカ産ブルーサファイア 0.434ctルース

[Listing #12563493] Sri Lankan Blue Sapphire 0.434ct Loose Gemstone Sale price¥22,800
ブラジル産バイカラートルマリン 1.524ctルース 鑑別書

[Posted as 12563742] Brazilian Bicolor Tourmaline, 1.524 ct loose stone Sale price¥18,800
タンザニア産レッドスピネル 0.241ctルース 鑑別書

[Listed as 12563733] Tanzania Red Spinel 0.241ct Loose Stone Sale price¥43,800
タンザニア産アヤナスピネル（ホットピンクスピネル） 0.181ctルース 鑑別書

[Published as 12563759] Tanzanian Ayanad Spinel (Hot Pink Spinel) 0.181ct Loose Gemstone Sale price¥25,800
オーストラリア産ブラックオパール 1.797ctルース 鑑別書

[Posted on 12563864] Australian Black Opal 1.797ct Loose Stone Sale price¥69,800
タンザニア産バイカラーゾイサイト 1.382ctルース 鑑別書

[Listed as 12563903] Tanzanian Bicolor Zoisite 1.382ct Loose Stone Sale price¥45,800
スリランカ産パープルサファイア 5.5mm/0.730ctルース 鑑別書

[Listed as 12563918] Sri Lankan Purple Sapphire 0.730ct Loose Stone Sale price¥55,800
ブラジル産アレキサンドライト 0.105ctルース 鑑別書

Brazilian Alexandrite 0.105ct Loose Stone [Listed under 12563842] Sale price¥29,800
アフガニスタン産アウイナイト 0.222ctルース 鑑別書

[Posted 12563878] Green Hauyne from Afghanistan, 0.222 ct Loose Stone Sale price¥79,800
[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available]

[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available] Sale price¥2,980
[On sale July 20th at 10 PM] "Limited to 13 Stones" Diamond Gacha: Win a FANCY VIVID Yellow Diamond (with sorting report) worth 22,800 yen. One loose stone. (Multiple purchase discount available.)

[On sale July 20th at 10 PM] "Limited to 13 Stones" Diamond Gacha: Win a FANCY VIVID Yellow Diamond (with sorting report) worth 22,800 yen. One loose stone. (Multiple purchase discount available.) Sale price¥2,580
ビルマ産非加熱ジェダイスピネル 0.430ctルース GUILD

[Lottery Sale 0812_17] Unheated Burmese Jedi Spinel 0.430ct Loose Gemstone GUILD Sale price¥118,000
Brazilian Euclase (Bicolor Euclase) 0.302ct Loose Stone

Brazilian Euclase (Bicolor Euclase) 0.302ct Loose Stone Sale price¥45,800
ブラジル産シトリン 2.734ctルース

[12552852] Citrine 2.734ct loose stone Sale price¥22,800
マダガスカル産ニードルホワイトトパーズ 8.9mm/3.619ctルース

[12555446] White topaz 3.619ct loose stone Sale price¥8,800
インターナリーフローレスダイヤモンド 0.300ctルース(D, IF) GIA

[Lottery Sale ①_202608_12] Internally Flawless Diamond 0.300 ct Loose (D, IF) GIA Sale price¥118,000
ブラジル産パーティカラートルマリン 15.355ctルース 鑑別書

[Lottery Sale ②_202608_16] Loose Brazilian Parti-Color Tourmaline 15.355ct Sale price¥39,800
コロンビア産ユークレース 0.546ctルース

Colombian Euclase 0.546ct Loose Stone Sale price¥25,800
ジンバブエ産バイカラーユークレース 0.152ctルース

[On sale May 11th at 10 PM] Bi-color Euclase from Zimbabwe, 0.152ct loose stone Sale price¥19,800
American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose

American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose Sale price¥8,800
American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose

American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose Sale price¥7,980
高知県産ボケ珊瑚（サンゴ） 7.900ctルース

Lottery Sale ⑧ [For Winners Only] [Listed as 12563226] Kochi Prefecture Boke Coral (Sango) 7.900ct Loose Stone Sale price¥59,800

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.