Product list

【甲州貴石切子】レピドクロサイトインクォーツ 44.310ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] Lepidocrocite in Quartz 44.310ct《Collaboration》Loose with emblem Sale price¥55,800

[#202607 Akihabara Popup Out for Sale] [Lottery Sale 12] [For Winners Only] [12562560 Listed] Unheated Montana Sapphire (Yogo Origin) 0.159ct Loose with Certificate Sale price¥98,000

[Lottery Sale 0829] Cambodian Blue Zircon (Ratanakiri Blue) 3.363ct Loose Gemstone Sale price¥98,000

K18YG ブラジル産パライバトルマリン 0.066ct ダイヤモンド0.091ctペンダント（ネックレス）ソーティング

[Lottery Sale 0829] K18YG Brazilian Paraiba Tourmaline 0.066ct Diamond 0.091ct Pendant (Necklace) with Sorting Sale price¥158,000

K18YG タンザニア産アルマンディンガーネット 1.003ct・ピンクサファイアリング

[Available 9/13, 10:00 PM] 18K Yellow Gold Tanzanian Almandine Garnet 1.003ct & Pink Sapphire Ring Sale price¥89,800

Pt900 スリランカ産ブルーサファイア0.465ct ダイヤモンド0.28ctリング鑑別書

[On sale 9/13, 10 PM] Pt900 Sri Lankan Blue Sapphire 0.465ct Diamond 0.28ct Ring with Identification Report Sale price¥118,000

[Available Sept. 12, 10:00 PM] Sri Lankan Silky Pink Sapphire 5.0mm/0.544ct Loose Gemstone with Identification Report Sale price¥25,800

[Available 9/12, 10:00 PM] Colombian Emerald 0.247ct Loose Gemstone Sale price¥39,800

イエローダイヤモンド 0.285ctルース(UNDER N(VERY LIGHT YELLOW), VS-1)

[Available 9/12 at 10:00 PM] Yellow Diamond 0.285ct Loose Stone (VERY LIGHT YELLOW, VS-1) Sale price¥55,800

[Available 9/11 at 10 PM] Almandine Garnet from Tanzania, 1.354ct Loose Gemstone Sale price¥15,800

[Available 9/11 at 10:00 PM] Mexican Fire Opal (faceted cut) 1.255ct loose stone Sale price¥49,800

[Available 9/29 at 10 PM] Sri Lankan Green Zircon 4.2mm/0.424ct Loose Gemstone Sale price¥8,800

[9/29 10 PM Sale] Cinnabar from Chenzhou, Hunan, China (0.646ct Loose Gemstone) Sale price¥18,800

[Available 9/29 at 22:00] Chinese Cinnabar from Hunan Province, 0.577ct loose stone Sale price¥15,800

[On sale 9/17 at 22:00] Hunan, China Cinnabar Loose Stone 0.532ct with Appraisal Certificate Sale price¥15,800

【9/17 22:00 Release】 Chinese Hunan Province Cinnabar 0.436ct Loose Stone with Identification Report Sale price¥13,800

Sri Lanka Green Zircon 1.113ct Loose Stone Sale price¥9,800

[9/24 10 PM Sale] Hunan, China Cinnabar 1.654ct Loose Stone with Identification Report Sale price¥19,800

[Available 9/13, 10:00 PM] Brazilian Rhodonite in Quartz 1.125ct Loose Stone Sale price¥9,800

[Available Sept 13, 10 PM] Australian White Opal 0.584ct Loose Stone (Rose Cut) Sale price¥8,800

[9/15 10 PM Release] Brazilian Goshenite 0.358ct Loose Gemstone Sale price¥8,800

タンザニア産サンストーン（イリュージョンサンストーン） 6.3mm/0.762ctルース

【9/11 10 PM Release】 Tanzanian Sunstone (Illusion Sunstone) 6.3mm/0.762ct Loose Gemstone Sale price¥9,800

【9/13 22:00 Release】 Euclase from Zimbabwe, 0.084ct loose stone, with identification report Sale price¥22,800

[Available 9/29 at 10 PM] Zimbabwean Bicolor Euclase 0.100ct Loose Gemstone with Identification Report Sale price¥19,800

[Ref: 12564362] Bicolor Euclase from Zimbabwe, 0.096ct loose stone Sale price¥22,800

[Available 9/13, 10 PM] Bicolor Euclase from Zimbabwe, 0.068ct Loose Gemstone with Identification Report Sale price¥14,800

[On sale 9/13 at 22:00] Bi-color Euclase from Zimbabwe, 0.075ct loose stone with identification report Sale price¥18,800

[On sale 9/15 at 10 PM] Tanzanian Blue Spinel 0.725ct Loose Gemstone with Identification Report Sale price¥22,800

[Available 9/15, 10 PM] Tanzanian Blue Spinel 0.449ct Loose Gemstone with Identification Report Sale price¥12,800

[Available 9/12 at 10 PM] Kenyan Unheated Gold Sheen Sapphire 0.314ct Loose Gemstone with Appraisal Report Sale price¥22,800

【On sale 9/12 at 10 PM】 Kenyan unheated gold sheen sapphire 0.329ct loose stone with appraisal report Sale price¥25,800

[Available 9/17 at 10:00 PM] Kenyan Unheated Gold Sheen Sapphire 0.408ct Loose Gemstone with Identification Report Sale price¥25,800

【Available 9/30 at 10 PM】 Burmese Red Spinel 0.210ct Loose Stone with Identification Report Sale price¥18,800

[Item 12564323] Burmese Red Spinel 0.188ct Loose Stone Sale price¥18,800

[9/11 10 PM Sale] Burmese Red Spinel 0.146ct Loose Stone with Appraisal Report Sale price¥15,800

[Available 9/11 at 10 PM] Burmese Red Spinel 0.100ct Loose Stone with Identification Report Sale price¥11,000

[9/13 10:00 PM Release] Spanish Pink Cobalt Calcite 0.523ct Loose Stone with Gem Identification Report Sale price¥39,800

[Available 9/13, 10:00 PM] Spanish Pink Cobalt Calcite 0.443ct Loose Stone with Identification Report Sale price¥35,800

【Available 9/17 at 10:00 PM】 Phenakite from Malyshevo, Russia, 0.510ct loose stone, JGL certified Sale price¥15,800

[Available 9/17 at 10:00 PM] Russian Phenakite from Malyshevo, 0.493ct Loose Gemstone, JGGL Certified Sale price¥14,800

[On sale 9/29, 10 PM] Russian Malyshevo Phenakite 4.7mm/0.428ct Loose Stone, JGL Certified Sale price¥14,800

[Item No. 12564331] Kenyan Gold Sheen Sapphire 0.224ct Loose Gemstone Sale price¥15,800

Tanzanian Dragon Garnet 0.748ct Loose Stone Sale price¥18,800

[9/7 10 PM Release] Brazilian Bicolor Tourmaline 3.337ct Loose Stone Sale price¥59,800

[Lottery Sale 0812_19] Bolivian Phosphophyllite 1.806ct Loose Stone with Gemstone Identification Report Sale price¥69,800

【Lottery Sale 0818_02】Brazilian Fanaizinho Sphene 0.956ct Loose Stone with Certificate Sale price¥19,800

K18 マダガスカル産パパラチアサファイア 4.3mm/0.412ct・ダイヤモンド0.57ctリング中宝鑑

[Lottery Sale 0812_11] K18 Madagascar Padparadscha Sapphire 0.412ct / Diamond 0.57ct Ring Sale price¥168,000

インターナリーフローレスダイヤモンド（H&C） 4.0mm/0.245ctルース(D, IF, 3Excellent H&C)

【9/6 10:00 PM Sale】Internally Flawless Diamond (H&C) 4.0mm/0.245ct Loose (D, IF, 3Excellent H&C) Sale price¥128,000

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.