Product list

[Listing 12563862] Australian Black Opal 1.392ct Loose Sale price¥69,800

Brazilian Euclase 0.224ct Loose Stone (Bicolor Euclase) Sale price¥18,800

Synthetic Alexandrite 0.578ct loose stone Sale price¥9,800

Brazilian Euclase 0.213ct loose stone (bicolor Euclase) Sale price¥12,800

Pakistani Clinohumite 1.440ct Loose Stone, Japan-Germany Exchange Sale price¥39,800

Mexican Fire Agate 6.090ct Loose Stone Sale price¥12,800

【9/1 10 PM Release】Colombian Emerald 0.123ct Loose Gemstone Sale price¥18,800

【9/1 10 PM Release】US Peridot 1.280ct Loose Stone Sale price¥18,800

[Available 9/1 at 10 PM] Tanzanian Tsavorite 0.366ct Loose Stone Sale price¥13,800

[Available 9/1 at 10 PM] Afghan Mint Color Tourmaline 0.290ct Loose Stone Sale price¥14,800

[9/1 10 PM Release] Brazilian Paraiba Tourmaline in Quartz 4.3mm/0.327ct Loose Stone Sale price¥18,800

[9/2, 10 PM release] Madagascar Padparadscha Sapphire 0.497ct Loose Stone, DGL Certified Sale price¥69,800

[9/2 10 PM Sale] Madagascar Sapphirine 0.166ct Loose Gemstone with Identification Report Sale price¥13,800

[On sale 9/1 at 22:00] Pigeon Blood Ruby 0.350ct Loose Stone AIGS Sale price¥49,800

[Available 9/2, 10:00 PM] Pigeon Blood Ruby 0.325ct Loose Stone, JTL Certified Sale price¥69,800

[Available 9/2 at 10 PM] Mahenge Spinel (Pink Spinel) from Tanzania, 0.366ct Loose Stone, with Identification Report Sale price¥39,800

[Available 8/31, 10 PM] Pakistani Axinite (Blue Tint) 0.263ct Loose Gemstone Sale price¥18,800

[On sale 9/3 at 22:00] Sri Lankan Purple Sapphire 0.556ct Loose Gemstone with Identification Report Sale price¥55,800

【Available 9/3 at 10:00 PM】 Sri Lankan Purple Sapphire 0.376ct Loose Stone with Appraisal Report Sale price¥35,800

[Available 9/3, 10 PM] Sri Lankan Purple Sapphire 0.258ct Loose Gemstone with Identification Report Sale price¥25,800

[9/3 10:00 PM Sale] Synthetic Rutile 3.8mm/0.278ct Loose Gemstone Sale price¥8,800

[Available 9/3 at 10:00 PM] 1.336ct Loose Blood Red Coral from Kochi Prefecture Sale price¥9,800

【Available Sept 3, 10:00 PM】YAG (Yttrium Aluminum Garnet) 5.7mm/0.992ct Loose Stone Sale price¥12,800

[Available 9/3 at 10 PM] Brazilian Montebrasite 4.0mm/0.251ct Loose Stone Sale price¥8,800

[Available 9/3, 10 PM] Turkish Diaspore 0.410ct Loose Stone Sale price¥9,800

[Available 9/3, 10 PM] Brazilian Rhodonite in Quartz 0.438ct Loose Stone Sale price¥8,800

[On sale 9/3 at 10:00 PM] Brazilian Rhodonite in Quartz 6.2mm/0.600ct Loose Stone Sale price¥9,800

【Available 9/3, 10:00 PM】 Sri Lankan Blue Sapphire 0.451ct Loose Gemstone with Appraisal Report Sale price¥29,800

Purple zoisite from Tanzania 1.103ct loose Japanese German edition Sale price¥98,000

Russian rough diamond (sawable) 0.101ct loose Sale price¥22,800

[Posted as 12563267] Rough Botswana Diamond (Sawable) 0.140ct Sale price¥44,800

[Published 12562277] Brazilian Marcasite in Quartz Loose Stone 4.188ct Sale price¥12,800

[Lottery Sale ②_202608_10] Yellow Sapphire 2.190ct Loose GIT Sale price¥158,000

【Lottery Sale ②_202608_15】Tanzanian Chrome Tourmaline 2.271ct Loose Stone Sale price¥98,000

[Listed as 12563354] Jeremejevite from Namibia, 0.103ct Loose Stone Sale price¥25,800

[Featured in 12563725] Sri Lankan Pink Sapphire 0.319ct Loose Sale price¥29,800

Pt950 ブルージルコン（ラタナキリブルー） 5.00ct ペンダントトップ（ネックレストップ）鑑別書

[Sale at 10 PM on August 25] [Colorful] Pt950 Blue Zircon (Ratanakiri Blue) 5.00ct Pendant Top (Necklace Top) with certificate Sale price¥148,000

[Published 22602679] [Calafuri] Pt900 Thai Ruby 1ct Ring Sale price¥298,000

[Featured in 22602706] [Calafuri] K18WG Turquoise Earrings Sale price¥24,800

K18YG アイドクレース/ベスビアナイト 0.908ct・ダイヤモンド0.19ctリング鑑別書

[Lottery Sale 0731_13] [Colorfury] K18YG Idocrase 0.908ct Ring with appraisal report Sale price¥128,000

[Published on 22602652] [Colorful] K18 Synthetic Opal Pendant Top Sale price¥16,800

Pt900 スターサファイア 0.744ct・ダイヤモンド0.167ctリング鑑別書

【22602701掲載】【Karafuri】Pt900 Star Sapphire 0.744ct Ring Sale price¥128,000

Pt900 マンダリンガーネット 1.15ct・ダイヤモンド0.11ctペンダントトップ（ネックレストップ）鑑別書

[22602704 Posted] [Colorful] Pt900 Mandarin Garnet 1.15ct Pendant Top Sale price¥110,000

Pt900 ロンドンブルーダイヤモンド 0.13ct・ダイヤモンド0.40ctリング鑑別書

[Published in 22602703] [Kalafull] Pt900 Ice Blue Diamond (Treated) 0.13ct Ring Sale price¥98,000

Pt900合成アレキサンドライト0.41ct・ダイヤモンド0.54ctリング鑑別書

[Lottery Sale 0812_08] Pt900 Synthetic Alexandrite and 0.54ct Diamond Ring with Certificate Sale price¥128,000

Pt900 モザンビーク産ルビー 4mm/0.3ct ・ダイヤモンド0.16ctペンダントトップ（ネックレストップ）鑑別書

[Lottery Sale 0812_05] Pt900 Mozambique Ruby 4mm/0.3ct and Diamond 0.16ct Pendant Top (Necklace Top) with Identification Report Sale price¥59,800

[Posted 12549460] Star peridot from Myanmar 3.748ct loose Sale price¥19,800

[Updated 12546024] Ametrine 4.206ct loose Sale price¥39,800

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.