Login
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 ”

Sort by
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） 0.302ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.302ct Loose Stone Sale price¥39,800
モザンビーク産アルマンディンガーネット 1.237ctルース

Mozambique Almandine Garnet 1.237ct Loose Stone Sale price¥12,800
YAG（イットリウムアルミニウムガーネット） 2.861ctルース

YAG (Yttrium Aluminum Garnet) 2.861ct loose stone Sale price¥25,800
ロシア産デマントイドガーネット 0.111ctルース

Russian Demantoid Garnet 2.5mm/0.111ct Loose Stone 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） 0.170ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.170ct Loose Sale price¥17,800
ロシア産デマントイドガーネット（ホーステール認む） 0.304ctルース

Russian Demantoid Garnet (Horsetail Recognized) 4.2mm/0.304ct Loose Stone Sale price¥98,000
モザンビーク産アルマンディンガーネット 1.229ctルース

Mozambique Almandine Garnet 1.229ct Loose Stone Sale price¥12,800
モザンビーク産アルマンディンガーネット 1.602ctルース

Mozambique Almandine Garnet 1.602ct Loose Stone Sale price¥15,800
モザンビーク産アルマンディンガーネット 1.465ctルース

Mozambique Almandine Garnet 1.465ct Loose Stone Sale price¥15,800
Mozambique Almandine Garnet 1.052ct Loose Stone

Mozambique Almandine Garnet 1.052ct Loose Stone Sale price¥12,800
モザンビーク産アルマンディンガーネット 1.065ctルース

Mozambique Almandine Garnet 1.065ct Loose Stone Sale price¥11,000
タンザニア産ロードライトガーネット 1.329ctルース

Tanzanian Rhodolite Garnet 1.329ct Loose Stone Sale price¥15,800
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） 0.119ctルース

Bekily Blue Garnet from Madagascar (color change garnet) 0.119ct loose Sale price¥12,800
ロシア産デマントイドガーネット（ホーステール認む） 0.187ctルース

Russian Demantoid Garnet (Horsetail) 3.5mm/0.187ct Loose Stone Sale price¥45,800
ロシア産デマントイドガーネット（ホーステール認む） 0.066ctルース

Russian Demantoid Garnet (Horsetail certified) 2.4mm/0.066ct loose stone Sale price¥12,800
ミャンマー産リューコガーネット 0.582ctルース【宝石図鑑掲載】

Myanmar Leuco Garnet 0.582ct Loose Stone [Featured in the Gemstone Encyclopedia] Sale price¥29,800
タンザニア産ツァボライト 0.748ctルース【宝石図鑑掲載】

0.748ct loose tsavorite from Tanzania [Featured in the Gemstone Encyclopedia] Sale price¥39,800
タンザニア産ロードライトガーネット 0.649ctルース

Tanzanian Rhodolite Garnet 0.649ct Loose Stone Sale price¥8,800
モザンビーク産アルマンディンガーネット 1.071ctルース

Mozambique Almandine Garnet 1.071ct Loose Stone Sale price¥9,800
モザンビーク産アルマンディンガーネット 2.185ctルース

Mozambique Almandine Garnet 2.185ct Loose Stone Sale price¥15,800
YAG（イットリウムアルミニウムガーネット） 1.772ctルース

YAG (Yttrium Aluminum Garnet) 7.0mm/1.772ct loose stone Sale price¥9,800
January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners}

January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners} Sale price¥2,980
タンザニア産カラーチェンジガーネット 0.789ctルース

Tanzania Color Change Garnet 0.789ct Loose Stone Sale price¥9,800
K18YG南洋真珠10.616ct・ベキリーブルーガーネット・アレキサンドライト・ダイヤモンドリング

K18YG South Sea pearl 10.616ct, Bekiri blue garnet, alexandrite and diamond ring Sale price¥198,000
1 Dragon Garnet (3.5mm, round cut) {Multiple purchase discounts available}

1 Dragon Garnet (3.5mm, round cut) {Multiple purchase discounts available} Sale price¥3,980
[9/7, 10:00 PM Release] &lt;<limited quantity>&gt; Dragon Garnet (Single Stone, 4.0mm, Round Cut)</limited>

[9/7, 10:00 PM Release] <> Dragon Garnet (Single Stone, 4.0mm, Round Cut) Sale price¥5,980
パイロープ・スペサルティンガーネット（カラーチェンジガーネット）1石 ルース

Pyrope spessartine garnet (color change garnet) 1 stone loose (multiple purchase discount available) Sale price¥5,980
Sold out YAG（イットリウムアルミニウムガーネット） 1.709ctルース

YAG (Yttrium Aluminum Garnet) 7.1mm/1.709ct loose stone
Sold out K18 ルビー 0.75ct ガーネット,サファイア,アメジスト,エメラルド,トパーズ,ダイヤモンドペンダントトップ（ネックレストップ）鑑別書

K18 ルビー 0.75ct ガーネット,サファイア,アメジスト,エメラルド,トパーズ,ダイヤモンドペンダントトップ（ネックレストップ）鑑別書

Sold out [Available 10/4 at 10 PM] 《Limited to 11 stones》 Garnet Gacha including Russian Demantoid Garnet (normally 69,800 yen) (plus 1 Mint Garnet stone included) 《Multi-purchase discounts available》

[Available 10/4 at 10 PM] 《Limited to 11 stones》 Garnet Gacha including Russian Demantoid Garnet (normally 69,800 yen) (plus 1 Mint Garnet stone included) 《Multi-purchase discounts available》
Sold out [Available 9/26 at 10 PM] <limited quantity> Hong Kong Sourcing Gacha (7 types including Tanzanite, Hauyne, Color-Change Sapphire, Bekily Blue Garnet, etc.) 1 stone (plus 1 Rainbow Obsidian) <multiple purchase discount available></multiple></limited>

[Available 9/26 at 10 PM] Hong Kong Sourcing Gacha (7 types including Tanzanite, Hauyne, Color-Change Sapphire, Bekily Blue Garnet, etc.) 1 stone (plus 1 Rainbow Obsidian)

Sold out Color-change gacha featuring one gemstone, including Myanmar color-change zircon, alexandrite, and Bekily blue garnet, usually priced at 39,800 yen (multi-purchase discounts available)

Color-change gacha featuring one gemstone, including Myanmar color-change zircon, alexandrite, and Bekily blue garnet, usually priced at 39,800 yen (multi-purchase discounts available)
Sold out ブラジル産スペサルティンガーネット 1.592ctルース 鑑別書

[Posted on 12564085] Brazilian Spessartine Garnet 1.592ct Loose
Sold out タンザニア産アルマンディンガーネット 1.210ctルース

[Available 9/30 at 10 PM] Tanzanian Almandine Garnet 1.210ct Loose Gemstone

Sold out Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone

Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone
Sold out 《Limited to 5 stones》Garnet (KEN Cut, 3.4-3.7mm)《Multiple purchase discount available》

《Limited to 5 stones》Garnet (KEN Cut, 3.4-3.7mm)《Multiple purchase discount available》
Sold out 《Limited 7 stones》Garnet (KEN Cut, approx. 4mm)《Multiple purchase discount available》

《Limited 7 stones》Garnet (KEN Cut, approx. 4mm)《Multiple purchase discount available》
Sold out アメリカ産アントヒルガーネット 0.392ctルース

[Available 9/11 at 10 PM] US-mined Anthill Garnet 4mm/0.392ct Loose Stone
Sold out タンザニア産ドラゴンガーネット 0.735ctルース

Tanzanian Dragon Garnet 0.735ct Loose Stone
Sold out K18 ロシア産デマントイドガーネット（ホーステール認む） 4.6mm/0.44ctct ダイヤモンド 0.57ctリング鑑別書

[Available Sept 6, 10 PM] K18 Russian Demantoid Garnet (horsetail inclusions visible) 4.6mm/0.44ct, Diamond 0.57ct Ring with Appraisal Report
Sold out ベキリーブルーガーネット（カラーチェンジガーネット） 1.015ctルース

Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 1.015ct loose stone

Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.093ctルース

[Available Aug 29, 10:00 PM] Russian Demantoid Garnet (horsetail inclusion visible) 2.7mm/0.093ct loose stone
Sold out 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） 1.170ctルース

Russian Demantoid Garnet (horsetail inclusion visible) 6.3mm/1.170ct Loose Stone GIA

Sold out ブラジル産スペサルティンガーネット 0.923ctルース

[Listed as 12564067] Brazilian Spessartine Garnet 0.923ct Loose Stone
Sold out ミャンマー産ピンクグロッシュラーガーネット 0.558ctルース

[Lottery Sale 0718_11] Pink Grossular Garnet from Myanmar, 0.558 ct. Loose Stone, JGGL certified
Sold out ナイジェリア産マンダリンガーネット 1.347ctルース

[#202607 Akihabara Pop-up Store - Currently Removed] [12559462 Listed] Nigerian Mandarin Garnet 1.347ct Loose Gemstone
Sold out [On sale 8/14 at 10 PM] Limited to 10 Stones: Rhodolite Garnet Gacha with a chance to win a "Dandelion Cut 9mm" collaboration with Shimizu Kiseki, normally 35,800 yen (Multiple purchase discount available)

[On sale 8/14 at 10 PM] Limited to 10 Stones: Rhodolite Garnet Gacha with a chance to win a "Dandelion Cut 9mm" collaboration with Shimizu Kiseki, normally 35,800 yen (Multiple purchase discount available)
Sold out ブラジル産スペサルティンガーネット 0.580ctルース

【On sale August 9th at 10 PM JST】Brazilian Spessartine Garnet, 0.580 ct Loose Stone, with Identification Report

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.