New stock

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

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

[Sales begin July 21st, 10 PM] Kochi Prefecture Harvested Red Coral 1.446ct Loose Stone Sale price¥12,800

[On sale July 21st, 10 PM JST] Kochi Prefecture natural red coral 1.119ct loose stone Sale price¥11,800

[On sale July 18, 10 PM JST] Kochi Prefecture Blood Coral 1.001ct Loose Stone Sale price¥12,800

[Sales begin 10 PM on July 18] Kochi Prefecture blood coral, 1.290 ct loose stone Sale price¥12,800

【Sales Start: July 18, 10 PM JST】Kochi Prefecture Blood Red Coral 1.348ct Loose Stone Sale price¥12,800

[Sale starts 10 PM, July 17th] High-Grade Red Coral (Kochi Prefecture) 1.063ct Loose Stone Sale price¥12,800

[On sale July 16th at 10 PM] Kochi Prefecture produced oxblood coral, 1.087ct loose gemstone Sale price¥12,800

【Sales begin 10:00 PM on July 16th】Brazilian Limonite In Quartz (Aurora Quartz) 2.094ct Loose Stone Sale price¥8,800

[On Sale July 16, 10 PM JST] Brazilian Limonite in Quartz (Aurora Quartz) 2.291ct Loose Stone Sale price¥9,800

[On sale July 17 at 10 PM] Brazilian Dendritic Quartz 4.571ct Loose Stone Sale price¥12,800

[Sale starts 10 PM JST, July 17] Brazilian Dendritic Quartz 5.085ct Loose Gemstone Sale price¥12,800

[Sale on July 17th, 10 PM JST] Australian Rainbow Lattice Sunstone 0.850ct Loose Gemstone Sale price¥8,800

[On sale July 17 at 10 PM JST] Australian Rainbow Lattice Sunstone 0.722ct Loose Sale price¥14,800

[Sale on July 18th, 10 PM JST] South African Sugilite 0.748ct Loose Stone Sale price¥13,800

[On sale July 19 at 10 PM] Brazilian Rose Quartz 8.7mm/2.536ct Loose Stone Sale price¥11,800

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） 0.650ctルース

[On sale July 20 at 10 PM] Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture, 0.650ct Loose Stone Sale price¥16,800

[Sale at 10 PM on July 20th] American Oregon Sunstone 7.0mm/1.345ct Loose Sale price¥35,800

[On Sale 7/18 at 10 PM] US Oregon Sunstone 1.032ct Loose Stone Sale price¥25,800

Rainbow Lattice Sunstone from Australia 0.352ct Loose Stone [On sale July 18, 10 PM JST] Sale price¥8,800

[Sale July 18, 10 PM JST] Australian Rainbow Lattice Sunstone 4.133 ct Loose Stone Sale price¥28,800

[Sales from 22:00 on July 18] Brazilian Lavender Quartz (Scoletite) 1.266ct Loose Sale price¥12,800

[On sale July 19 at 10 PM JST] Tanzanian UV-type Grossular Garnet 0.294ct Loose Sale price¥25,800

[Sale July 19 at 10 PM] Synthetic Rutile 5.3mm/0.844ct Loose Stone Sale price¥13,800

[Sale on 7/19 at 10 PM] Brazilian Yellow Beryl 1.472 ct Loose Stone Sale price¥19,800

Madagascar Apatite 0.564ct Loose Stone [Sales start July 19, 10 PM JST] Sale price¥9,800

[On sale July 19th at 10 PM] Nepal Bi-Color Kyanite 0.526ct Loose Stone Sale price¥15,800

[On Sale July 19th, 10 PM JST] Nepali Kyanite 0.477ct Loose Stone Sale price¥12,800

【Sales Start: July 19, 10 PM JST】Mexican Danburite Loose Stone 4.146ct Sale price¥29,800

[On sale July 19th at 10 PM] Tanzanian Kornerupine 0.196ct Loose Stone Sale price¥15,800

[On sale July 19 at 10 PM] Sri Lankan Uva Moonstone 0.974ct Loose Gemstone Sale price¥12,800

[Sale on July 19 at 10 PM] Sri Lankan Uva Moonstone 7.7mm/1.763ct Loose Gemstone Sale price¥19,800

[On sale July 19 at 10 PM JST] Tanzanian Bicolor Zoisite 0.255ct Loose Stone Sale price¥8,800

[On sale July 19 at 10 PM JST] Tanzanian Zoisite 4.9mm/0.472ct Loose Stone Sale price¥15,800

[Sales start July 20th, 10 PM JST] [Colorflee] K18 Diamond 0.15ct Pendant Top (Necklace Top) Sale price¥29,800

Sold out

【Lottery Sale 6】【For Winners Only】【Listed as 12563902】Tanzanian Bi-Color Zoisite 1.136ct Loose Stone with Certificate

[Available 10 PM, July 22nd] Namibian Jeremejevite 0.140ct Loose Gemstone with Certificate Sale price¥33,800

[On sale July 22nd, 10 PM JST] Colombian Bicolor Emerald 0.824ct Loose Gemstone Sale price¥25,800

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.