Login
5月誕生石

May birthstone

The birthstone for May is emerald / jade .

Emerald is a type of beryl, the same mineral as aquamarine, and is the name given to beryl, which contains chromium and has a green color. One of the characteristics is that many of them have scratches and inclusions inside. The most famous and high-quality production area is Colombia. The emerald cut is said to have originated from Colombian emeralds.

Jade is also a gemstone with an impressive green color, but it actually comes in a wide variety of colors, including purple, orange, and white. It is also famous for being mined in Japan, mainly in Niigata and Toyama prefectures, and has been selected as Japan's national stone. Highly transparent green jade called ``Roukan'' is the most valuable.

Karatz GemMagazine
" List of May birthstones and birthstones "

Sort by
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.074ctルース

Colombian trapiche emerald (reverse trapiche) 0.074ct loose Sale price¥11,000
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.108ctルース

Colombian trapiche emerald (reverse trapiche) 0.108ct loose Sale price¥13,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.084ctルース

Colombian trapiche emerald (reverse trapiche) 0.084ct loose Sale price¥9,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.144ctルース

Colombian trapiche emerald (reverse trapiche) 0.144ct loose Sale price¥18,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.053ctルース

Colombian trapiche emerald (reverse trapiche) 0.053ct loose Sale price¥8,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.094ctルース

Colombian trapiche emerald (reverse trapiche) 0.094ct loose Sale price¥12,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.170ctルース

Colombian trapiche emerald (reverse trapiche) 0.170ct loose Sale price¥15,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.188ctルース

Colombian trapiche emerald (reverse trapiche) 0.188ct loose Sale price¥18,800
コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.093ctルース

Colombian trapiche emerald (reverse trapiche) 0.093ct loose Sale price¥9,800
ブラジル産エメラルド 3.3mm/0.119ctルース

Brazilian emerald 3.3mm/0.119ct loose Sale price¥22,800
ブラジル産エメラルドキャッツアイ0.459ctルース

Brazilian emerald cat's eye 0.459ct loose Sale price¥6,980
コロンビア産パイライトインエメラルド 7.836ctルース

Colombian pyrite in emerald 7.836ct loose Sale price¥398,000
コロンビア産エメラルド ルース・原石2石セット（ラウンドカット3mm）

Colombian emerald loose rough stone set of 2 stones (round cut 3mm)《Multiple purchase discount available》 Sale price¥6,980
コロンビア産エメラルドキャッツアイ1石ルース（平均0.35ct)《初めての方向け》

Colombian emerald cat's eye 1 stone loose (average 0.35ct)《For first-time users》《Multiple purchase discount available》 Sale price¥12,800
coming soon 【9/12 22時販売】《限定7石》ロシア産ノンオイルエメラルド1石ルース(1.5-1.6ｍｍ,ステップカット)《複数購入割引有》

【9/12 22時販売】《限定7石》ロシア産ノンオイルエメラルド1石ルース(1.5-1.6ｍｍ,ステップカット)《複数購入割引有》 Sale price¥5,980
coming soon K18YGコロンビア産エメラルド0.062ct・ダイヤモンドリング

18K Yellow Gold Colombian Emerald 3.0mm/0.062ct Diamond Ring Sale price¥79,800
K18YG ミャンマー産翡翠（ヒスイ） 0.434ct・エメラルドリング

[On sale from 10/11 at 10 PM] 18K Yellow Gold Myanmar Jadeite and Emerald 0.434ct Ring Sale price¥79,800
coming soon ロシア産エメラルド 0.387ctルース

[On Sale at 10 PM on October 12th] Russian Emerald 0.387ct Loose Stone (F1, Minor Enhancement) GIA Sale price¥128,000
coming soon ロシア産エメラルド 0.282ctルース

[On Sale at 10 PM on October 12th] Russian Emerald 0.282ct Loose Stone (F1, Minor Enhancement) GIA Sale price¥128,000
Sold out ラベンダー翡翠（ヒスイ） 78.496ctルース 中宝

Lavender Jade (Jade) 78.496ct Loose Medium Treasure
Sold out 【12541077掲載】エメラルド 67.796ct原石

[On sale at 10pm on August 7th] 67.796ct rough emerald
Sold out エメラルド 0.111ctルース

Emerald 0.111ct loose
Sold out [Sold at 10 PM on September 5th] Single loose Russian oil-free emerald (2.2mm, round cut) {Multiple purchase discounts available}

[Sold at 10 PM on September 5th] Single loose Russian oil-free emerald (2.2mm, round cut) {Multiple purchase discounts available}

Sold out ブラジル産ミントカラーエメラルド 0.281ctルース

[On Sale at 10 PM on September 5th] Brazilian Mint Emerald 0.281ct Loose

Sold out ザンビア産エメラルド 0.171ctルース

[12560254] Zambian emerald 0.171ct loose stone
Sold out コロンビア産エメラルドキャッツアイ 0.093ctルース

Colombian emerald cat's eye 0.093ct loose
Sold out [8/10:22 Sale] {Limited to 5 Stones} Pentagon Cut Gacha (Sphene, Sunstone, Emerald, etc.) 1 Loose Stone {Multiple Purchase Discounts Available}

[8/10:22 Sale] {Limited to 5 Stones} Pentagon Cut Gacha (Sphene, Sunstone, Emerald, etc.) 1 Loose Stone {Multiple Purchase Discounts Available}
Sold out エメラルド 27.866ct原石

[Posted in 12541080] Emerald 27.866ct rough stone
Sold out エメラルド 79.202ct原石

[Posted 12541079] Emerald 79.202ct rough stone
Sold out エメラルド 162.375ct原石

[Posted 12541071] Emerald 162.375ct rough stone
Sold out ブラジル産アレキサンドライト 0.044ctルース

Brazilian Alexandrite 0.044ct Loose Stone (Emerald Cut)
Sold out コロンビア産パイライト付きエメラルド 43.368ct原石

Colombian pyrite emerald 43.368ct rough stone
Sold out コロンビア産パイライト付きエメラルド 30.109ct原石

Colombian pyrite emerald 30.109ct rough stone
Sold out コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.147ct原石

Colombian trapiche emerald (reverse trapiche) 0.147ct rough stone
Sold out ブラジル産アレキサンドライト 0.054ctルース（エメラルドカット）

Brazilian Alexandrite 0.054ct loose stone (emerald cut)
Sold out コロンビア産エメラルドキャッツアイ 0.217ctルース

Colombian emerald cat's eye 0.217ct loose stone
Sold out コロンビア産エメラルドキャッツアイ 0.179ctルース

Colombian emerald cat's eye 3.6mm/0.179ct loose stone
Sold out コロンビア産エメラルド 10.708ct原石

Colombian emerald 10.708ct rough stone
Sold out Ethiopian oil-free emerald 0.32ct loose GIA

Ethiopian oil-free emerald 0.32ct loose GIA

Sold out コロンビア産エメラルド 0.922ct原石

Colombian emerald 0.922ct rough stone (Canutillo)
Sold out ロシア産ノンオイルエメラルド 0.840ctルース GIA

[On sale from 10pm on 5/4] Russian oil-free emerald 0.84ct loose GIA
Sold out エメラルド 3mm/0.126ct ルース

Colombian emerald 3mm/0.126ct loose

Sold out エメラルド 3.1mm/0.117ctルース

Colombian emerald 3.1mm/0.117ct loose

Sold out 【12533497掲載】コロンビア産エメラルドキャッツアイ 0.065ctルース

Colombian emerald cat's eye 0.065ct loose
Sold out コロンビア産エメラルド 2.680ct原石

Colombian emerald 2.680ct rough stone
Sold out コロンビア産エメラルド 0.350ct原石

Colombian emerald 0.350ct rough stone
Sold out コロンビア産エメラルドキャッツアイ 0.079ctルース

Colombian emerald cat's eye 0.079ct loose
Sold out コロンビア産エメラルドキャッツアイ 0.061ctルース

Colombian emerald cat's eye 0.061ct loose

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.