January birthstone

Many people may have the impression that garnet is a red gemstone, but it actually comes in many shades. In fact, garnet is not the name of a single gemstone, but the name of a group of minerals with similar chemical compositions. Also, there are some types that are made by mixing several types, so I think it would be fun to collect gemstones with different colors and types. Some types appear to change color depending on the light source.

Karatz GemMagazine “ List of January birthstones and birthstones ”

【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

Tanzanian Rhodolite Garnet 10.608ct Loose Stone Sale price¥79,800

【11/3 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） 0.349ctルース Sale price¥39,800

【11/3 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） 0.398ctルース Sale price¥49,800

【11/3 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） 0.365ctルース Sale price¥42,800

【11/3 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） 0.470ctルース Sale price¥55,800

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） 0.464ctルース

[Item 12564681] Bekily Blue Garnet (Color Change Garnet) from Madagascar, 0.464ct Loose Gemstone Sale price¥59,800

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） 0.394ctルース

[Item 12564676] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.394ct Loose Stone Sale price¥49,800

[12565162 Listed] Spessartine Garnet from Tanzania 0.739ct Loose Gemstone Sale price¥25,800

[12565160] Tsavorite from Kenya, 0.439ct loose stone Sale price¥29,800

[12565159] Tsavorite from Kenya, 0.314ct loose stone Sale price¥18,800

[10/18 10:00 PM Release] Tanzanian Mandarin Garnet 4.5mm/0.529ct Loose Stone with Identification Report Sale price¥29,800

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） 0.231ctルース

[Item 12565145] Bekily Blue Garnet (Color Change Garnet) from Madagascar, 0.231ct loose stone Sale price¥22,800

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） 0.620ctルース鑑別書

[Item 12564627] Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 0.620ct Loose Stone Sale price¥69,800

Mozambique Almandine Garnet 1.144ct Loose Stone Sale price¥15,800

【10/10 10:00 PM Release】《Limited to 3 stones》 Nigerian Aquamarine Gacha (including Santa Maria color / cut by KEN) (Includes 1 KEN garnet) 《Multiple purchase discounts available》 Sale price¥3,980

[Available 10/14 at 10 PM] Russian Demantoid Garnet (horsetail inclusions visible) 0.206ct Loose Gemstone Sale price¥79,800

Limited quantity: Mozambique grape garnet, 1 loose stone (4 x 6 mm, pear-shaped cut) Multiple purchase discounts available Sale price¥3,980

[Available 10/5 at 10:00 PM] Tanzanian Rhodolite Garnet 0.510ct Loose Stone Sale price¥9,800

[Item 12563638] Tanzanian Bicolor Grossular Garnet 0.904ct Loose Stone Sale price¥25,800

K18 ロシア産デマントイドガーネット（ホーステール認む） 3.5mm/0.155ct ダイヤモンド0.04ctリング鑑別書

[Available 9/25, 10:00 PM] [Coloriful] K18 Russian Demantoid Garnet (Horsetail inclusion verified) 3.5mm/0.155ct, Diamond 0.04ct Ring with Identification Report Sale price¥128,000

[Available 9/19 at 10 PM] <9 sets only> Rainbow Garnet rough & loose stone set from Tenkawa, Nara (includes one hexagonal pyrite) <multi-buy discount available></multi-buy>

[Available 9/19 at 10 PM] <9 sets only> Rainbow Garnet rough & loose stone set from Tenkawa, Nara (includes one hexagonal pyrite) Sale price¥6,980

[Available 9/23 at 10 PM] Tanzanian Almandine Garnet 1.267ct Loose Gemstone Sale price¥14,800

YAG (Yttrium Aluminum Garnet) 6.5mm/1.551ct Loose Stone Sale price¥15,800

YAG (Yttrium Aluminum Garnet) 7mm/1.686ct Loose Stone Sale price¥12,800

Almandine garnet 2.421ct loose Sale price¥16,800

Russian demantoid garnet (horsetail recognized) 5.5mm/0.710ct loose Sale price¥188,000

[202608GIA Appraisal Request] [Sale on June 5th at 10 PM] Russian Demantoid Garnet (with horsetail inclusion) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000

【202608GIA Appraisal Request】【On Sale June 5th, 10 PM】Russian Demantoid Garnet (with horsetail inclusion) 6.8mm/1.366ct Loose Stone with Appraisal Report Sale price¥458,000

Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone Sale price¥228,000

ロシア産デマントイドガーネット（ホーステール認む） 5.3mm/0.692ctルース

Russian demantoid garnet (horsetail recognized) 5.3mm/0.692ct loose Sale price¥158,000

[202608GIA Appraisal Request] Russian Demantoid Garnet (horsetail inclusion confirmed) 5.2mm/0.661ct Loose Stone Sale price¥248,000

K18YG タンザニア産アルマンディンガーネット 1.003ct・ピンクサファイアリング

[Available 9/13, 10:00 PM] 18K Yellow Gold Tanzanian Almandine Garnet 1.003ct & Pink Sapphire Ring Sale price¥89,800

[Available 9/11 at 10 PM] Almandine Garnet from Tanzania, 1.354ct Loose Gemstone Sale price¥15,800

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

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

[9/7 10:00 PM Sale] Tanzania Bicolor Grossular Garnet 0.433ct Loose Stone Sale price¥15,800

【Available 9/7 at 10 PM】 Tanzanian Bicolor Grossular Garnet 0.596ct Loose Gemstone Sale price¥14,800

[Available 9/24 10:00 PM] USA Anthill Garnet 4.0mm, 0.336ct Loose Stone Sale price¥9,800

【Sales start: August 11, 10 PM JST】《Limited 14 stones》Rare Stone Gacha featuring Leucogarnet, Cinnabar, Gahnite, and more!《Bulk Purchase Discount Available》 Sale price¥7,980

Pt900 グロッシュラーガーネット 1.31ct ダイヤモンド0.24ctリング鑑別書

[Published as 22602712] [Colorful] Pt900 Grossular Garnet 1.31ct Diamond 0.24ct Ring with Appraisal Report Sale price¥128,000

[8/29 10 PM Sale] Tanzanian Mint Garnet 0.296ct Loose Gemstone Sale price¥8,800

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） 0.284ctルース

【#202607 Akihabara Pop-up, Currently Out of Stock】【12563254 Listed】Madagascar Bekily Blue Garnet (Color Change Garnet) 0.284ct Loose Sale price¥59,800

[Available 9/1 at 10 PM] Tanzanian Tsavorite 0.366ct Loose Stone Sale price¥13,800

【Available Sept 3, 10:00 PM】YAG (Yttrium Aluminum Garnet) 5.7mm/0.992ct Loose Stone Sale price¥12,800

Pt900 マンダリンガーネット 1.15ct・ダイヤモンド0.11ctペンダントトップ（ネックレストップ）鑑別書

[22602704 Posted] [Colorful] Pt900 Mandarin Garnet 1.15ct Pendant Top Sale price¥110,000

[On sale August 27th at 10 PM JST] Russian Demantoid Garnet (Horsetail inclusion visible) 3.8mm/0.280ct Loose Sale price¥59,800

【Sales start: August 22nd, 10 PM JST】Tanzanian Mint Garnet 0.238ct Loose Stone 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.