Under 1.0 ct

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

[Listed on 12563962] Madagascar Padparadscha Sapphire 0.314 ct Loose Stone Sale price¥69,800

[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

Afghan Green Hauyne 0.062ct Loose with Certificate Sale price¥16,800

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

0.752ct Tanzanian Golden Zircon Loose Gemstone with Certificate Sale price¥12,800

[Listed as 12563891] Namibian Jeremejevite 0.089ct Loose Sale price¥22,800

Brazilian Alexandrite 0.102ct Loose Stone with Certification Sale price¥29,800

[Sales start August 2nd at 10 PM] Madagascar blue sapphire 0.662 ct loose gemstone with a certificate Sale price¥18,800

[On sale August 2 at 10 PM] Colombian Emerald 0.107 ct Loose Gemstone with Certificate Sale price¥12,800

[On sale August 1 at 10 PM] Australian black opal 0.702 ct loose stone with certificate Sale price¥29,800

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

Columbia Cosquez Mine Trapiche Emerald 0.144ct Loose with Identification Report Sale price¥22,800

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

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.240ctルース

Nara Prefecture, Tenkawa Village Rainbow Garnet (Andradite Garnet) 3.5mm/0.240ct Loose Sale price¥8,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.336ctルース

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture, 3.8mm/0.336ct Loose Stone Sale price¥9,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 3.9mm/0.378ctルース（ローズカット）

Andradite Garnet (Rainbow Garnet) from Tenkawa Village, Nara Prefecture, 3.9mm/0.378ct loose stone (rose cut) Sale price¥9,800

Apatite from Madagascar 0.608ct Loose Stone Sale price¥8,800

Kochi Prefecture-produced red coral 0.978ct loose stone Sale price¥9,800

【Sales begin August 12, 10 PM JST】Kochi Prefecture-produced Oxblood Coral 0.908ct Loose Stone Sale price¥9,800

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

Colombia Emerald Cat's Eye 0.060ct Loose, Hōki Kyō Sale price¥15,800

0.319 ct Tanzanian bicolor grossular garnet loose stone Sale price¥19,800

Madagascar Padparadscha Sapphire 3.4mm/0.208ct Loose Gem with Central Gem Laboratory Appraisal Sale price¥45,800

Madagascar Paparadscha Sapphire 3.5mm/0.234ct Loose Stone, Central Gem Lab certified Sale price¥49,800

[On sale 8/14 at 10 PM] US Sweet Home Mine Rhodochrosite 0.179ct Loose Stone with Certificate Sale price¥14,800

[On sale August 11th, 10 PM] Sweet Home Mine Rhodochrosite 0.104ct Loose Stone with Certificate Sale price¥8,800

[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

[Listed as 12563489] Sri Lankan Blue Sapphire 0.636 ct Loose Stone Sale price¥39,800

[Listed as 12563731] Brazilian Indicolite Tourmaline 0.404 ct Loose Stone Sale price¥39,800

[Listed as 12563371] Zimbabwe Euclase 0.087ct Loose Gemstone Sale price¥19,800

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

マラウイ産ピンクサファイア（マラウイサファイア） 3.0mm/0.128ctルース

[Listed as 12563467] Malawi sapphire 0.128ct loose stone Sale price¥18,800

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

Jeremejevite 0.226ct Loose Sale price¥45,800

[Listed on 12563726] Sri Lankan Purple Sapphire 0.661ct Loose Stone Sale price¥59,800

Australian Rainbow Lattice Sunstone 0.850ct Loose Stone Sale price¥8,800

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.