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1月誕生石

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 ”

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Pt900グロッシュラーガーネット 1.38ct・ダイヤモンド0.13ctリング 鑑別書

[On sale 6/27 10 PM] [Colorful] Pt900 Grossular Garnet 1.38ct and Diamond 0.13ct Ring with Appraisal Sale price¥98,000
アルマンディンガーネット 1.471ctルース

Almandine Garnet 1.471ct Loose Stone Sale price¥14,800
アルマンディンガーネット 1.388ctルース

Almandine Garnet 1.388ct Loose Stone Sale price¥11,800
アルマンディンガーネット 1.988ctルース

Almandine Garnet 1.988ct Loose Stone Sale price¥16,800
アルマンディンガーネット 1.485ctルース

Almandine Garnet 1.485ct Loose Stone Sale price¥15,800
アルマンディンガーネット 1.058ctルース

Almandine Garnet 1.058ct Loose Stone Sale price¥12,800
ロードライトガーネット 0.448ctルース

Tanzanian Rhodolite Garnet 0.448ct Loose Stone Sale price¥6,980
Tanzanian Rhodolite Garnet 0.810ct Loose Stone

Tanzanian Rhodolite Garnet 0.810ct Loose Stone Sale price¥9,800
YAG（イットリウムアルミニウムガーネット） 0.317ctルース

YAG (Yttrium Aluminum Garnet) 3.9mm/0.317ct loose stone Sale price¥6,980
YAG（イットリウムアルミニウムガーネット） 0.574ctルース

YAG (Yttrium Aluminum Garnet) 4.9mm/0.574ct loose stone Sale price¥8,800
YAG（イットリウムアルミニウムガーネット） 0.672ctルース

YAG (Yttrium Aluminum Garnet) 5.0mm/0.672ct loose stone Sale price¥9,800
YAG（イットリウムアルミニウムガーネット） 0.346ctルース

YAG (Yttrium Aluminum Garnet) 4.1mm/0.346ct Loose Stone (Rose Cut) Sale price¥8,800
YAG（イットリウムアルミニウムガーネット） 0.208ctルース

YAG (Yttrium Aluminum Garnet) 3.3mm/0.208ct Loose Stone (Rose Cut) Sale price¥5,980
アルマンディンガーネット 0.660ctルース

Almandine Garnet 0.660ct Loose Sale price¥6,980
[On sale June 19th at 10 PM] "Limited 7 Stones" Anthill Garnet Single Loose Stone (Oval Cut, approx. 4x3mm) "Multiple Purchase Discount Available"

[On sale June 19th at 10 PM] "Limited 7 Stones" Anthill Garnet Single Loose Stone (Oval Cut, approx. 4x3mm) "Multiple Purchase Discount Available" Sale price¥3,980
[Sales begin 10 PM JST on 6/21] Dragon Garnet Single Loose Stone (Round Cut, 5mm) - Limited to 5 Stones - Multi-Purchase Discount Available

[Sales begin 10 PM JST on 6/21] Dragon Garnet Single Loose Stone (Round Cut, 5mm) - Limited to 5 Stones - Multi-Purchase Discount Available Sale price¥8,800
タンザニア産アルマンディンガーネット 0.938ctルース

【Sales start: June 15, 10 PM JST】Almandine Garnet from Tanzania 0.938ct Loose Stone Sale price¥12,800
ミャンマー産リューコガーネット 0.128ctルース

[On Sale June 20th, 10 PM JST] Myanmar Leuco Garnet 0.128ct Loose Stone with Appraisal Report Sale price¥25,800
ミャンマー産リューコガーネット 0.108ctルース

【Sales start at 10 PM on June 21】Myanmar Leuco Garnet 0.108ct Loose Gemstone with Certificate Sale price¥22,800
マダガスカル産スペサタイトガーネット 1.053ctルース

Spessartite Garnet from Madagascar 1.053ct loose stone Sale price¥29,800
ロシア産デマントイドガーネット（ホーステール認む） 1.366ctルース

[Sales start June 5th, 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 6.8mm/1.366ct Loose Stone with Appraisal Report Sale price¥398,000
ロシア産デマントイドガーネット（ホーステール認む） 1.589ctルース

[On sale June 5th at 10 PM] Russian Demantoid Garnet (Horsetail inclusion confirmed) 6.9mm/1.589ct Loose Stone with Appraisal Report Sale price¥458,000
ロシア産デマントイドガーネット（ホーステール認む） 0.876ctルース

[On sale 6/5 at 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000
ケニア産ツァボライト 0.357ctルース

[On sale May 31, 10 PM JST] Tsavorite from Kenya 4.0mm/0.357ct loose stone Sale price¥12,800
アルマンディンガーネット 0.814ctルース

Almandine Garnet 0.814ct Loose Stone Sale price¥7,980
アルマンディンガーネット 1.049ctルース

Almandine Garnet 1.049ct Loose Stone Sale price¥9,800
ロシア産デマントイドガーネットキャッツアイ（ホーステール認む） 0.200ctルース

Russian Demantoid Garnet Cat's Eye (Horsetail Recognized) 0.200ct Loose Sale price¥18,800
GGG（ガドリウムガリウムガーネット） 0.511ctルース

[Sale at 10 PM on May 22] GGG (Gadolinium Gallium Garnet) 0.511 ct Loose Stone Sale price¥12,800
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） 0.082ctルース

[On sale May 12th at 10 PM] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.082ct Loose Stone Sale price¥8,800
タンザニア産バイカラーグロッシュラーガーネット 2.057ctルース

[On Sale May 12th at 10 PM] Bi-Color Grossular Garnet from Tanzania, 2.057 ct, Loose Stone Sale price¥55,800
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） 2.678ctルース

[Sale on May 26th at 10 PM] Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 7.4mm/2.678ct Loose Stone Sale price¥15,800
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） 0.656ctルース

【Sale from 10 PM on May 23】Nara Prefecture Tenkawa Village Rainbow Garnet (Andradite Garnet) 4.8mm/0.656ct Loose Stone Sale price¥11,000
[On sale May 4th at 10 PM] "Limited to 11 Gems" Rouge Cut & Heart Shape Gemstone Gacha for ¥18,800! 💎 Almandine Garnet, Pink Tourmaline, Scolecite, Sapphire. "Multiple Purchase Discount Available"

[On sale May 4th at 10 PM] "Limited to 11 Gems" Rouge Cut & Heart Shape Gemstone Gacha for ¥18,800! 💎 Almandine Garnet, Pink Tourmaline, Scolecite, Sapphire. "Multiple Purchase Discount Available" Sale price¥4,980
[On Sale 5/2 at 10 PM JST] Mozambique Almandine Garnet 17.770ct Loose Stone

[On Sale 5/2 at 10 PM JST] Mozambique Almandine Garnet 17.770ct Loose Stone Sale price¥98,000
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone Sale price¥25,800
Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone

Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone Sale price¥18,800
[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.167ct Loose Stone

[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.167ct Loose Stone Sale price¥16,800
Sold out [On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.206ct Loose Stone

[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.206ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.188ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.188ct Loose Stone Sale price¥18,800
0.186ct loose Bekily blue garnet (color-change garnet) from Madagascar

0.186ct loose Bekily blue garnet (color-change garnet) from Madagascar Sale price¥18,800
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） 0.213ctルース

[Sale on May 18th at 10 PM] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.213ct Loose Stone Sale price¥22,800
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） 1.533ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 1.533ct loose Sale price¥6,980
GGG (Gadolinium Gallium Garnet) 3.046ct Loose Stone

GGG (Gadolinium Gallium Garnet) 3.046ct Loose Stone Sale price¥18,800
Tanzanian Rhodolite Garnet 5.9mm/1.084ct Loose

Tanzanian Rhodolite Garnet 5.9mm/1.084ct Loose Sale price¥12,800
《Limited to 10 stones》Mozambique Grape Garnet loose stone (6×4mm, pear cut) 《Bulk purchase discount available》

《Limited to 10 stones》Mozambique Grape Garnet loose stone (6×4mm, pear cut) 《Bulk purchase discount available》 Sale price¥3,980
タンザニア産スペサルティンガーネット 0.417ctルース

[Sale on May 5th at 10 PM] Tanzanian Spessartine Garnet 0.417ct Loose Gemstone Sale price¥12,800
タンザニア産スペサルティンガーネット 0.359ctルース

[On sale May 10th at 10 PM] Tanzanian Spessartine Garnet 0.359ct Loose Stone Sale price¥9,800
《Limited to 13 stones, Tucson Arrivals》Kenya Bi-Color Grossular Garnet, usually ¥29,800, average 0.63ct. Tucson Arrivals 《Multiple Purchase Discount Available》

《Limited to 13 stones, Tucson Arrivals》Kenya Bi-Color Grossular Garnet, usually ¥29,800, average 0.63ct. Tucson Arrivals 《Multiple Purchase Discount Available》 Sale price¥9,800

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.