Width: 4.1 - 5.0mm

[Available Sept 21, 10 PM] Brazilian Mint Color Emerald 0.451ct Loose Stone Sale price¥15,800

[On sale 9/21 at 22:00] Sri Lankan Green Zircon 0.403ct Loose Stone Sale price¥5,980

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

[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 9/17 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

[Available 10/16, 10 PM] Russian Malyshevo Phenakite 0.489ct Loose Stone (JGL Certified) Sale price¥15,800

【Available Oct 15 at 10 PM】 Sri Lankan Green Zircon 0.802ct Loose Gemstone Sale price¥16,800

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

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

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

1.953ct Bicolor Sphalerite from Spain Sale price¥18,800

Zimbabwean Apatite (UV Type) 0.585ct Loose Sale price¥8,800

Nigerian Aventurine Aquamarine 0.471ct Loose Stone Sale price¥6,980

Violet Sapphire 4.3mm/0.328ct Loose Sale price¥15,800

Manganotantalite 0.736ct loose stone from Japan and Germany Sale price¥128,000

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

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

Colombian Trapiche Emerald 0.372ct Loose Sale price¥18,800

Tanzanite from Tanzania 0.262ct loose stone Sale price¥8,800

Zimbabwean Blue Apatite (UV type) 1.056ct loose stone Sale price¥9,800

【9/6 10PM On Sale】Pakistan Oil-in-Quartz 0.281ct Loose Gemstone Sale price¥4,980

ブラジル産レインボーアクアマリン（イリデッセンスアクアマリン） 1.930ctルース

[Available 9/10 at 10 PM] Brazilian Rainbow Aquamarine (Iridescence Aquamarine) 1.930ct Loose Stone Sale price¥18,800

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

【Available Sept 10, 10:00 PM】 Tanzanian Bicolor Grossular Garnet 0.869ct Loose Stone Sale price¥25,800

[Available 9/7 at 10 PM] Indian Parrot Chrysoberyl 0.630ct Loose Gemstone Sale price¥18,800

[Available 9/7 at 10 PM] Sri Lankan Chrysoberyl Cat's Eye 4.3mm / 0.526ct Loose Gemstone Sale price¥15,800

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

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

Mozambique Aquamarine 4.9mm/0.463ct Loose Stone Sale price¥8,800

[Lottery Sale 0731_10] Colombian Muzo Non-Oil Emerald 0.370ct Loose GIA Sale price¥298,000

[Available 8/29 at 10 PM] Madagascar Andalusite 0.454ct Loose Gemstone Sale price¥7,980

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

[8/29 10 PM Sale] Brazilian Lavender Quartz (Skorolite) 0.475ct Loose Gemstone Sale price¥7,980

[#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

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

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

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

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

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

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

[Sale on August 27th at 10 PM] Synthetic Rutile 0.566ct Loose Stone Sale price¥9,800

[On sale August 22nd, 10 PM JST] Brazilian pink tourmaline 4.9mm/0.400ct loose stone, Hōki Kyō Sale price¥15,800

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.