5 major gems

Mexican Opal 0.499ct Loose Sale price¥3,980

Sri Lankan Star Sapphire 1.225ct Loose Sale price¥12,800

Sri Lankan Star Sapphire 1.682ct Loose Sale price¥12,800

Sri Lankan Star Sapphire 1.339ct Loose Sale price¥12,800

Sri Lankan Star Sapphire 2.093ct Loose Sale price¥8,800

South African diamond rough (sawable) 0.085ct rough Sale price¥15,800

South African diamond rough (sawable) 0.110ct rough Sale price¥22,800

[12551148] Australian black opal 3.890ct loose stone Sale price¥69,800

[Available June 18th at 10 PM] [Colorful] K18WG Diamond 1.03ct Pendant Top Sale price¥128,000

[Sale on 6/8 at 10 PM] Pt900 Benitoite 0.152ct / Diamond 0.58ct Ring Sale price¥188,000

[On sale June 21st at 10 PM] Teal Green Sapphire 3.1mm/0.142ct Loose Stone Sale price¥15,800

[On sale June 21st at 10 PM] Australian Black Opal 0.755ct Loose Stone Sale price¥12,800

[On sale June 14th at 10 PM] Australian Black Opal 1.080ct Loose Stone Sale price¥39,800

[On sale June 13th at 10 PM] Blue Sapphire 0.369ct Loose Stone (with Japan-Germany gemological report) Sale price¥22,800

[On Sale June 18th at 10 PM] Madagascar Bi-Color Sapphire 3.7mm/0.271ct Loose Gemstone Sale price¥6,980

[On sale June 18th at 10 PM] Madagascar Bi-Color Sapphire 5.1mm/0.607ct Loose Stone Sale price¥14,800

Sold out

[On sale June 14, 10 PM JST] Madagascar Bi-Color Sapphire 4.5mm/0.506ct Loose Stone

[Sale on June 23 at 10 PM] Madagascar Bicolor Sapphire 4.7mm/0.488ct Loose Stone Sale price¥9,800

[On sale June 23rd, 10 PM JST] Colombian Trapiche Emerald 0.210ct Loose Stone Sale price¥39,800

[On sale June 15th at 10 PM] Natural Kyanite from Nepal 2.863ct Loose (Royal Blue Color) Sale price¥15,800

[On sale June 21st, 10 PM] Mexican Fire Opal Loose Stone 2.279ct Sale price¥15,800

【Sales begin on 6/21 at 10 PM】Mexican Fire Opal 1.857ct Loose Gemstone Sale price¥25,800

[Available June 21 at 10 PM] Botswana Rough Diamond (Sawable) 0.087ct Rough (Trigon) Sale price¥21,800

[On Sale 10 PM, June 14th] Botswana Rough Diamond (Sawable) 0.090ct (Trigon) Sale price¥22,800

[Available 6/18 10 PM JST] Botswana rough diamond (sawable) 0.118ct (trigon) Sale price¥29,800

[Sales on 6/13 at 10 PM] Madagascar Pink Sapphire 0.239ct Loose Stone, Japan-Germany Gemstone Institute certified Sale price¥18,800

K18WG クロムトルマリン 0.70ctct・サファイア0.30ctペンダントトップ（ネックレストップ）鑑別書

[On sale 10 PM on 6/14] [Colorful] K18WG Chrome Tourmaline 0.70ct / Sapphire 0.30ct Pendant Top (Necklace Top) with appraisal Sale price¥79,800

[On Sale June 13, 10 PM] [Limited to 2 Stones] Brown Diamond (4mm/0.3ct, with certificate) [Multiple Purchase Discount Available] Sale price¥5,980

[On sale June 19, 10 PM] Colombian Trapiche Emerald 0.183ct Loose Stone Sale price¥39,800

[On sale June 20 at 10 PM] Zimbabwe Rough Green Diamond (Sawable) 0.228ct Rough (Trigon) Sale price¥79,800

Royal Blue Sapphire 0.730ct Loose AIGS Sale price¥158,000

Sold out

Mexican Opal 0.677ct Loose

Diamond (cabochon cut) 0.206ct loose Sale price¥45,800

[On sale June 23rd at 10 PM] Sierra Leone rough diamond (sawable) 0.089ct rough (trigon) Sale price¥27,800

Madagascar sapphire 0.448ct loose stone Sale price¥15,800

Colombian mint color emerald 0.297ct loose stone Sale price¥8,800

Tanzanian green sapphire 0.303ct loose stone Sale price¥8,800

Mexican Fire Opal 0.593ct Loose (Faceted Cut) Sale price¥9,800

Mexican Fire Opal 0.718ct Loose Sale price¥9,800

Synthetic Opal 1.804ct Loose Sale price¥12,800

Pt900/K18 ルビー 0.28ct・ダイヤモンド0.20ct リング鑑別書

[Sale starts 10 PM, June 22] [Colorfuri] Pt900/K18 Ruby 0.28ct / Diamond 0.20ct Ring with Appraisal Report Sale price¥128,000

[Sale starts June 22nd, 10 PM] Colorful K18 Ruby 0.44ct & Diamond 0.18ct Ring with Appraisal Report Sale price¥148,000

K18 白蝶真珠（白蝶パール）鳥モチーフペンダントトップ（ネックレストップ）鑑別書

[Sale on 6/22 at 10 PM] Colorful K18 White South Sea Pearl, 0.17ct Diamond, Ruby, Sapphire, Emerald Bird Motif Pendant Top (Necklace Top) with Appraisal Report Sale price¥198,000

イエローダイヤモンド（トリートメント） 0.190ctルース(FANCY INTENSE YELLOW*, SI-2)

[Sale starts at 10 PM on June 20th] Yellow Diamond (treated) 0.190ct Loose Stone (FANCY INTENSE YELLOW, SI-2) Sale price¥19,800

[On sale 6/20 10 PM JST] Loose Diamond 3.4mm/0.144ct (I, VS1, Good) Sale price¥16,800

[On sale June 23 at 10 PM] Untreated Ruby 0.207ct Loose Stone (Houseki Kyo certificate) Sale price¥69,800

《再入荷》【宝石商の道具】ゲルタックケース3個セット《透明・黒背景の2種類有》（ブルーサファイア3石付） - カラッツSTORE

[Jeweler's Tools] Set of 3 gel tack cases (2 types: transparent and black background) (includes 3 blue sapphires) (discount available for multiple purchases) Sale price¥3,980

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980

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.