New stock

[Sales Start: July 25th, 10 PM JST] Colombia Cosquez Mine Trapiche Emerald 0.138ct Loose Stone with Certification Sale price¥19,800

[On sale July 24 at 10 PM] Spanish Bicolor Sphalerite 6.6mm/1.521ct Loose Stone Sale price¥22,800

[On sale July 26th at 10 PM] Spanish Sphalerite 6.5mm/1.321ct Loose Stone Sale price¥19,800

[On sale July 27th at 10 PM] Brazilian color change fluorite, 1.099 ct 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） 0.240ctルース

[On Sale 7/27 10 PM] Nara Prefecture, Tenkawa Village Rainbow Garnet (Andradite Garnet) 3.5mm/0.240ct Loose Stone 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

[On Sale 7/27 10 PM] 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）

[On Sale July 24 at 10 PM] Nara Prefecture, Tenkawa Village Rainbow Garnet (Andradite Garnet) 3.9mm/0.378ct Loose Stone (Rose Cut) Sale price¥9,800

[On sale July 26th, 10 PM JST] Madagascar Apatite 0.608ct Loose Gemstone Sale price¥8,800

【On sale at 10 PM on July 26】Kochi Prefecture red coral 1.439ct loose gemstone Sale price¥9,800

[On sale July 26th at 10 PM] Kochi Prefecture Red Coral 0.978ct Loose Stone Sale price¥9,800

【Sales start 10 PM, July 26 JST】Kochi Prefecture Blood Coral Loose Stone 1.128ct Sale price¥9,800

[On sale July 28th at 10 PM] Kochi Prefecture produced blood coral 1.238ct loose stone Sale price¥9,800

【Sales start: July 28, 10 PM JST】Kochi Prefecture Produced Blood Coral 1.286ct Loose Stone Sale price¥9,800

【For Sale July 28, 10 PM JST】Kochi Prefecture Red Coral Loose Stone 1.379 ct Sale price¥11,800

[On sale July 26th at 10 PM] Kochi Prefecture Red Coral 1.321ct Loose Stone Sale price¥9,800

[Available 7/28 10 PM JST] Colombian Emerald, 4.5mm/0.286ct Loose Gemstone, Hoki-kyo Sale price¥69,800

【7/29 10 PM Sale】Colombian Emerald Cat's Eye 0.060ct Loose Stone (Houseki Kyo Appraisal) Sale price¥15,800

【Sales start: July 30, 10 PM JST】Tanzanian Bi-Color Grossular Garnet 0.319ct Loose Stone Sale price¥19,800

[On sale July 26th at 10 PM] Madagascar Padparadscha Sapphire 3.4mm/0.208ct Loose Stone with Central Gem Lab Certificate Sale price¥45,800

[On sale July 31, 10 PM JST] Madagascar Padparadscha Sapphire 3.5mm/0.234ct Loose Stone with Central Gemological Laboratory certificate Sale price¥49,800

[Posted on 12563934] Colombian Emerald 0.792ct Loose Stone Sale price¥39,800

[Listing 12563881] Green Afghan Hauyne 0.086ct Loose Stone Sale price¥22,800

[On sale July 28th at 10 PM] Cambodian Blue Zircon (Ratanakiri Blue) 1.360ct Loose Stone with Certificate Sale price¥18,800

[On sale 7/28 10 PM] USA Oregon Sunstone 6.7mm/1.032ct Loose Stone Sale price¥18,800

[Listed as 12563874] Afghanistan Green Hauyne 0.185ct Loose Stone Sale price¥65,800

[Listed as 12563838] Loose Golden Beryl from Brazil, 1.369ct Sale price¥7,980

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

[Listed as 12563246] Mexican Fire Opal 1.115ct Loose Sale price¥25,800

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

[12562256 listed] American Neptunite 0.199ct Loose Sale price¥55,800

[Published on 12563061] Padparadscha Sapphire 0.897ct Loose Stone Sale price¥198,000

[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

[22602668 listed] [Colorful] K18 Tanzanite 0.25ct Ring Sale price¥79,800

[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

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

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

Tanzanian Zircon 1.237 ct Loose Stone [Listing 12563381] Sale price¥15,800

Jeremejevite 0.226ct Loose Sale price¥45,800

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

[22602667 Posted] [Colorful] Pt900 Hauyne 0.035ct Ring Sale price¥89,800

K18 グロッシュラーガーネット 0.26ctct ペンダントトップ（ネックレストップ）

[22602626 listed] [Kalafr] K18 Grossular Garnet 0.26ct Charm Sale price¥39,800

[Published on 22602652] [Colorful] K18 Synthetic Opal Pendant Top Sale price¥19,800

Pt900 ブラックダイヤモンド 1.00ct・ダイヤモンド0.50ctリング鑑別書

[Lottery Sale 12][For Winners Only][Posted on 22602618] Pt900 Black Diamond 1.00ct / Diamond 0.50ct Ring Sale price¥158,000

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

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.