Birthstone list

[Listing 12561095] Mexican Fire Opal 0.450ct Loose Stone Sale price¥15,800

【11/13 22時販売】マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 3.6mm/0.283ctルース Sale price¥39,800

【11/13 22時販売】《限定4石》ブラジル産レインボーアクアマリンガチャ1石ルース（平均0.77ct）《複数購入割引有》 Sale price¥6,980

[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》 Sale price¥59,800

[Item 12563058] Royal Blue Sapphire 0.850ct Loose Stone Sale price¥128,000

【11/11 22時販売】モザンビーク産アクアマリン 1.172ctルース Sale price¥14,800

【11/11 22時販売】ブラジル産トルマリンキャッツアイ 3.414ctルース Sale price¥51,800

[Sale 6/] 10:00 PM - Limited 11 Stones - Sri Lankan Pink Sapphire (Emerald Cut) Average 0.73ct (Multiple Purchase Discount Available) Sale price¥2,980

[12565156] Tanzanian Mandarin Garnet 0.443ct Loose Stone Sale price¥25,800

カメレオンダイヤモンド 0.226ctルース(FANCY LIGHT GRAY GREENISH YELLOW（カメレオン）, VS2)

[Deadline: Sat, Aug 29, 10:00 AM | Lottery Sale] Chameleon Diamond 0.226ct Loose Stone (FANCY LIGHT GRAY GREENISH YELLOW (Chameleon), VS-2) Sale price¥45,800

Pt900 タンザニア産タンザナイト 1.16ct ・ダイヤモンド0.22ctペンダントトップ（ネックレストップ）鑑別書

[9/4 (Lottery Sale_13)] Pt900 Tanzanian Tanzanite 1.16ct / Diamond 0.22ct Pendant Top (Necklace Top) with Identification Report Sale price¥128,000

Pt950 ブラジル産サンタマリアアクアマリン 0.67ct・ダイヤモンド0.90ctペンダントトップ（ネックレストップ）鑑別書

[Lottery Sale ①_09][For Winners Only][Item 22602783] Pt950 Brazilian Santa Maria Aquamarine 0.67ct & Diamond 0.90ct Pendant Top (Necklace Top) with Appraisal Report Sale price¥158,000

Pt900 ブラジル産パライバトルマリンCuO:2.7%、MnO:1.0% 0.09ct ダイヤモンド0.80ctペンダントトップ（ネックレストップ）鑑別書

[Deadline: Sat, Oct 3, 10:00 AM: Lottery Sale ①_11] Pt900 Brazilian Paraiba Tourmaline (CuO: 2.7%, MnO: 1.0%) 0.09ct & Diamond 0.80ct Pendant Top (Necklace Top) with Identification Report Sale price¥168,000

[Lottery Sale #2_202608_13] Brazilian Tetracholor Tourmaline 11.847ct Loose Stone with Certificate Sale price¥258,000

【11/2 22時販売】ペリドット 3.995ctルース（リリーパッドインクルージョン） Sale price¥22,800

【11/2 22時販売】ペリドット 3.858ctルース（リリーパッドインクルージョン） Sale price¥25,800

【11/2 22時販売】ペリドット 2.834ctルース Sale price¥19,800

【11/2 22時販売】ペリドット 2.977ctルース Sale price¥19,800

【11/2 22時販売】タンザニア産アルマンディンガーネット 2.108ctルース Sale price¥12,800

Indian Moonstone 6.2mm/0.749ct Loose Sale price¥7,980

Colombian emerald 3.5mm/0.150ct loose stone Sale price¥22,800

Brazilian bicolor tourmaline 0.914ct loose stone Sale price¥12,800

Tanzanian Tanzanite 1.36ct Loose Sale price¥49,800

Burmese Ruby 0.418ct Loose Stone Japan-Germany Sale price¥29,800

Myanmar Ruby 0.283ct Loose Sale price¥25,800

Emerald 0.484ct loose Sale price¥7,980

Madagascar Pink Tourmaline 0.543ct Loose Stone Sale price¥12,800

[Lottery Sale_07][For Winners Only][Item No. 12564402] Brazilian Indicolite Tourmaline 1.027ct Loose Stone with Appraisal Report Sale price¥98,000

[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_03] Diamond (H&C) 4.5mm/0.353ct Loose Stone (E, VS-2, 3Excellent H&C) Includes CGL Report & Sarine Light Report Sale price¥79,800

[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_04] Diamond (H&C) 4.5mm/0.345ct Loose Stone (G, VS-2, 3Excellent H&C) CGL Certified Sale price¥69,800

[Sun, Oct 4, 10:00 AM Deadline: Lottery Sale #2_07] Kashmir Unheated Sapphire 3.2mm/0.190ct Loose Stone GIA Sale price¥128,000

Tanzanite from Tanzania 0.478ct loose stone Sale price¥8,800

Tanzanite from Tanzania 0.351ct loose stone Sale price¥8,800

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.161ct Loose Stone Sale price¥12,800

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.170ct Loose Sale price¥17,800

Australian Black Opal 0.386ct Loose Stone Sale price¥29,800

Madagascar White Topaz (Needle-in Topaz) 4.086ct Loose Sale price¥15,800

Brazilian Rubellite (Red Tourmaline) 3.844ct Loose Stone Sale price¥128,000

Brazilian Green Tourmaline 0.703ct Loose Stone Sale price¥15,800

Brazilian Green Tourmaline 0.764ct Loose Stone Sale price¥8,800

Sri Lankan Blue Sapphire 0.226ct Loose Sale price¥14,800

Kyanite 0.963ct loose stone (commonly known as Paraiba color kyanite) Sale price¥4,980

Sri Lankan White Sapphire 0.385ct Loose Sale price¥12,800

[12555443] White topaz 2.404ct loose stone Sale price¥9,800

ダイヤモンド 3.7mm/0.200ctルース(E, VS-2, 3Excellent) GIA

[Deadline: Sat, Oct 3, 10:00 AM: Lottery Sale ①_01] Diamond 3.7mm/0.200ct Loose Stone (E, VS-2, 3Excellent) GIA Sale price¥35,800

[Deadline: Wed, 9/22, 10:00 AM: Lottery Sale_10] Australian Teal Blue Sapphire 2.108ct Loose Stone with Appraisal Report Sale price¥98,000

[Deadline: Wed, Sept 22 at 10 AM: Lottery Sale_09] Parasitic Peridot 0.536ct Loose Stone, NGL Certified Sale price¥228,000

Mexican Fire Opal 0.780ct Loose Sale price¥12,800

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.