Sa line

[Lottery Sale 0725_05] Madagascar Teal Blue Sapphire 0.748ct Loose Stone with Appraisal Sale price¥28,800

【Lottery Sale 0718_07】Tanzanian Pink Zoisite 0.398ct Loose Stone with Certificate Sale price¥59,800

[Lottery Sale ②_202608_07] Myanmar Orange Spinel 0.855ct Loose Stone Sale price¥98,000

Tanzania Bicolor Zoisite 0.397ct Loose Stone Sale price¥8,800

【Available from 10 PM on 9/4】 Cambodian Blue Zircon 1.173ct Loose Stone Sale price¥15,800

【Available 9/6 at 10 PM】 Tanzanian Windsor Sapphire (Purple Sapphire) 0.277ct Loose Gemstone Sale price¥12,800

タンザニア産ウィンザーサファイア（カラーチェンジサファイア） 0.261ctルース

【9/12 22:00 Release】 Tanzanian Windsor Sapphire (Color Change Sapphire) 0.261ct Loose Gemstone Sale price¥9,800

【9/7 10 PM Release】Tanzanian Silky Pink Spinel 0.219ct Loose Gemstone Sale price¥8,800

[On sale 9/7 at 10 PM] Tanzanian Silky Pink Spinel 0.218ct Loose Stone Sale price¥8,800

[Available 9/7 at 10 PM] Mahenge Spinel (Pink Spinel) from Tanzania, 0.386ct loose stone Sale price¥15,800

[Available 9/11 at 10 PM] Sri Lankan Purple Sapphire 0.271ct Loose Gemstone with Identification Report Sale price¥18,800

Oregon Sunstone from the United States 0.292ct loose stone Sale price¥6,980

Oregon Sunstone from the United States 1.132ct loose stone Sale price¥12,800

Tanzania Bicolor Zoisite 0.278ct Loose Stone Sale price¥4,980

Tanzania Bicolor Zoisite 0.357ct Loose Stone Sale price¥6,980

[Lottery Sale 0818_07] Madagascar Bi-Color Sapphire 1.870ct Loose Stone with Gem Identification Report Sale price¥79,800

[8/30 22:00 Release] Madagascar Sapphirine 0.164ct Loose Stone with Appraisal Certificate Sale price¥12,800

[Available 8/30 at 10:00 PM] Madagascar Sapphirine 0.145ct Loose Stone with Identification Report Sale price¥11,800

【8/30 10 PM Release】Sphene from Zimbabwe 0.302ct Loose Gemstone Sale price¥8,800

[Available 8/30 at 10 PM] Zimbabwean Sphene 0.332ct Loose Gemstone Sale price¥9,800

[Available 8/29 at 10 PM] Tanzanian Purple Spinel 0.751ct Loose Stone Sale price¥18,800

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [Listed as 12555668] Cambodian Colorless Zircon 0.929ct Loose Stone Sale price¥9,800

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【12563063 Listed】Padparadscha Sapphire 0.619ct Loose Stone Sale price¥138,000

Royal blue sapphire 1.220ct loose stone Sale price¥258,000

[Lottery Sale ②_202608_08] Unheated Color Change Sapphire from Sri Lanka 1.140ct Loose Stone GIA Sale price¥258,000

【#202607 Akihabara Pop-up, Currently Out of Office】【12563057 Listed】Sri Lankan Royal Blue Sapphire 1.060ct Loose Stone Sale price¥188,000

[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

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

[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

【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

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

[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

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

[On sale 8/23 at 10 PM JST] Sri Lankan Yellow Sapphire 1.100ct Loose Stone, Japan/Germany certified Sale price¥49,800

[On sale August 23rd at 10 PM] US Oregon Sunstone 6.0mm/ 0.729ct Loose Sale price¥18,800

[On sale August 27th at 10 PM] Sri Lankan green sapphire 0.354ct loose stone with certificate Sale price¥12,800

[On sale August 27th at 10 PM] Tanzanian spinel, 0.644ct loose stone (with needle inclusions) with a gemological report Sale price¥19,800

[On sale August 27 at 10 PM] Tanzanian Spinel 0.536ct Loose (with needle inclusions) - with appraisal report Sale price¥15,800

[Posted on 12563358] Jeremejevite from Namibia 0.150ct Loose Sale price¥37,800

[Published as 12563385] Tanzanian Zircon 3.964ct Loose Sale price¥39,800

【12563732 Posted】Tanzanian Red Spinel 0.177ct Loose Sale price¥35,800

[On sale August 28th, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.515ct Loose Gemstone with Certificate Sale price¥14,800

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.