Vertical: 4.1 - 5.0mm

[#202607AkihabaraPopUpOnLoan][12563137 Listed] Brazilian Santa Maria Aquamarine 0.264ct Loose Stone Sale price¥18,800

[#202607 Akihabara Pop-up, Currently Off-site] [12563253 Posted] Afghan Hauyne 0.112ct Loose Stone Sale price¥28,800

カメレオンダイヤモンド 0.255ctルース(FANCY LIGHT GRAYISH GREENISH YELLOW（カメレオン）, SI-2)

[On Sale 8/13 at 10 PM] Chameleon Diamond 0.255ct Loose (FANCY LIGHT GRAYISH GREENISH YELLOW (Chameleon), SI-2) Sale price¥79,800

[On sale August 9, 10 PM] Nigerian Indicolite Tourmaline 0.241ct Loose Stone with Certification Sale price¥25,800

【Sales start: August 13, 10 PM JST】Loose Zimbabwe Sphene, 0.512 ct, with certificate Sale price¥17,800

[On Sale August 13th at 10 PM] Zimbabwe Sphene 0.499ct Loose Gemstone with Certificate Sale price¥17,800

[On sale August 13 at 10 PM] 0.356ct Zimbabwe Sphene Loose Stone with Certificate Sale price¥12,800

[On sale August 16 at 10 PM] Brazilian Spessartine Garnet 0.580ct Loose Stone with Certificate of Authenticity Sale price¥14,800

【On sale August 9th at 10 PM JST】Brazilian Spessartine Garnet, 0.580 ct Loose Stone, with Identification Report Sale price¥15,800

[On sale August 11th at 10 PM] Brazilian Pink Tourmaline 0.689ct Loose Stone with Appraisal Sale price¥15,800

[On Sale August 16, 10 PM] Burmese Red Spinel 0.236ct Loose Stone with Certificate Sale price¥45,800

[On sale August 2nd at 10 PM JST] Sweet Home Mine Rhodochrosite 0.100ct Loose Gemstone with Certificate Sale price¥8,800

コロンビア産パイライト・雲母インエメラルド 4.8mm/0.360ctルース鑑別書

[Sale on 8/6 at 10 PM JST] Colombian Pyrite and Mica in Emerald, 4.8mm/0.360ct, Loose Stone with Certificate Sale price¥29,800

[On sale August 1, 10 PM] Colombian Cosquez Trapiche Emerald 0.252ct Loose Stone with Certificate Sale price¥35,800

[On sale August 1, 10 PM JST] Colombian Cosquez Trapiche Emerald, 0.231 ct, Loose Stone with Certificate Sale price¥33,800

[On sale August 14th at 10 PM] Colombian Cosquez Trapiche Emerald, 0.199ct Loose Stone with Appraisal Sale price¥29,800

0.750ct Loose Nigerian Mandarin Garnet with Certification Sale price¥22,800

[12558272 listed] Brazilian Medusa Quartz (Paraiba Quartz) 0.456ct Loose Sale price¥9,800

Afghan Green Hauyne 0.150ct Loose Stone with Certificate Sale price¥55,800

0.184ct Trapiche Emerald Loose from Cosquez, Colombia, with Appraisal Report Sale price¥25,800

Colombia Cosquez Mine Trapiche Emerald 0.177ct Loose Gemstone with Certification Sale price¥29,800

Colombian Trapiche Emerald (from Cosquez) 0.157ct Loose Stone with Certificate Sale price¥22,800

Colombia Cosquez Mine Trapiche Emerald 0.138ct Loose with Certificate Sale price¥19,800

Colombia Emerald 4.5mm/0.286ct Loose Stone (Hokikyō) Sale price¥69,800

[On sale August 5th at 10 PM] Afghan Green Hauyne 0.086ct Loose Stone with Certificate Sale price¥22,800

[12563386 posted] Brazilian Dioptase 0.487ct Loose Stone Sale price¥12,800

【Listed on 12563251】Afghan Hauyne 0.080ct Loose Sale price¥25,800

[Posted on 12563480] Madagascar Teal Green Sapphire 0.470ct Loose Stone Sale price¥29,800

0.522ct bicolor sapphire loose stone from Madagascar Sale price¥6,980

[Posted on 32501949] Diamond 0.310ct Loose Stone (E, VS1, 3Excellent) GIA Sale price¥88,800

[Published on 12563087] Unheated Ruby 0.216ct Loose Stone Sale price¥59,800

ダイヤモンド 4.3mm/0.310ctルース(D, VS1, Excellent) GIA

[Lottery Sale 0707_02] Diamond 0.310ct Loose (D, VS1, Excellent) GIA Sale price¥89,800

ダイヤモンド 4.0mm/0.250ctルース(D, VVS1, 3Excellent) GIA

[Lottery Sale 0707_01] Diamond 0.250ct Loose Stone (D, VVS1, 3Excellent) GIA Sale price¥79,800

0.294ct UV Type Grossular Garnet Loose Stone from Tanzania Sale price¥25,800

Bi-color Kyanite from Nepal, 0.526ct, Loose Sale price¥15,800

Kyanite from Nepal 0.477ct Loose Gemstone Sale price¥12,800

Tanzanian Bicolor Zoisite 0.255ct Loose Stone Sale price¥8,800

Tanzanian Zoisite 4.9mm/0.472ct Loose Sale price¥15,800

[On Sale August 2nd at 10 PM] Jeremejevite from Namibia, 0.199 ct Loose Stone with Certificate Sale price¥45,800

[On sale August 2 at 10 PM JST] Tanzanian Ayana spinel (hot pink spinel) 0.182 ct loose stone with gemological report Sale price¥25,800

[12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report Sale price¥118,000

ブラウンダイヤモンド 5.0mm/0.556ctルース(FANCY LIGHT BROWN, VS-1)

Loose Brown Diamond 5.0mm/0.556ct (FANCY LIGHT BROWN, VS-1) Sale price¥39,800

[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone Sale price¥39,800

[Listed 12563403] Petzottaite from Madagascar 0.200ct Loose Sale price¥29,800

[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone Sale price¥29,800

Tanzanian Bicolor Grossular Garnet 0.544ct Loose Gemstone Sale price¥14,800

Tanzanian Bicolor Grossular Garnet 0.586ct Loose Stone Sale price¥14,800

Jeremejevite 0.218ct Loose Stone, Namibian, with Certificate of Authenticity Sale price¥49,800

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.