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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 "

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Sold out (In Stock) Lottery Sale 4 [For Winners Only] [Published on 12559711] Colombian Oil-Free Emerald 0.050ct Loose Stone (NONE) GIA
Sold out コロンビア産パイライトインエメラルド 4.680ctルース
Sold out US Benitoite 0.148ct Loose Stone (Emerald Cut) with Gem Identification Report
Sold out Pt900 コロンビア産ミントカラーエメラルド 4mm/0.22ct ・ダイヤモンド0.16ctペンダントトップ(ネックレストップ)鑑別書
Sold out [On sale 8/15 at 10 PM JST] Colombian Emerald Gacha featuring Shimizu Kisaki's 8mm Clover In-cut (regularly 79,800 JPY) - only 15 stones available! (Bonus green beryl included) [Multiple purchase discount available]
Sold out コロンビア産パイライト・雲母インエメラルド 0.271ctルース 鑑別書
Sold out コロンビア・コスケス鉱山トラピッチェエメラルド 0.177ctルース 鑑別書
Sold out コロンビア産エメラルド 1.470ctルース
Sold out コロンビア産エメラルド 0.792ctルース
Sold out K18 翡翠(ヒスイ) 1.051ct ペンダントトップ(ネックレストップ)
Sold out ザンビア産エメラルド 1.267ctルース
Sold out ザンビア産エメラルド 1.112ctルース 鑑別書
Sold out コロンビア産パイライトインエメラルド 4.222ctルース
Sold out コロンビア産エメラルド 0.135ctルース
Sold out コロンビア産パイライトインエメラルド 2.107ctルース
Sold out Pt900 エメラルド 0.30ct ・ダイヤモンド0.01ctペンダントトップ(ネックレストップ)
Sold out "Limited 17 Stones" Emerald Gacha 💎 Win Koshu Kiseki Kiriko, rose cut, or mint green emeralds that normally retail for ¥88,800. 《Bulk purchase discount available》
Sold out コロンビア産パイライトインエメラルド 3.817ctルース
Sold out コロンビア産エメラルド 0.167ctルース
Sold out コロンビア産パイライト・雲母インエメラルド 0.844ctルース
Sold out 【12562862掲載】コロンビア産トラピッチェエメラルド 0.448ctルース
Sold out ブラジル産グリーンベリル 0.559ctルース
Sold out Non-Oil Emerald 0.555ct Loose Stone by Nikkei
Sold out Pt950 ブラジル産バイカラーエメラルド 1.084ct リング
Sold out Colombian non-oil emerald (NONE) 0.060ct loose GIA
Sold out Colombian emerald 0.153ct rough stone
Sold out 【12562785掲載】コロンビア産エメラルドキャッツアイ 0.574ctルース
Sold out コロンビア産エメラルド 4.7mm/0.468ctルース
Sold out コロンビア産エメラルドキャッツアイ 1.571ctルース
Sold out コロンビア産パイライトインエメラルド 2.780ctルース
Sold out Loose Columbian Pyrite in Emerald 3.346 ct
Sold out コロンビア産パイライトインエメラルド 2.503ctルース
Sold out Colombian mica in emerald 1.314ct loose
Sold out Colombian No-Oil Emerald 0.120ct Loose Stone GIA
Sold out 18K Yellow Gold Colombian Emerald Ring
Sold out エメラルド 2.498ctルース
Sold out コロンビア産エメラルド 2.018ctルース
Sold out 《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》
Sold out Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)
Sold out 【12561946掲載】ブラジル産エメラルドインクォーツ 2.358ctルース
Sold out 【12561945掲載】ブラジル産エメラルドインクォーツ 3.367ctルース
Sold out 《Limited to 6 sets》 Colombian Reverse Trapiche Emerald & Brazilian Emerald (Sugarloaf Cut) 2-Stone Set《Multiple purchase discount available》
Sold out Colombian emerald 10.940ct rough stone
Sold out Emerald Gacha (including Emerald Cat's Eye and special cuts) featuring Russian non-oil emeralds, etc. 💎 (Multiple purchase discount available)
Sold out Colombian emerald rough stone 18.900ct (with pyrite)
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) 0.457ct原石
Sold out 0.243ct Colombian Emerald Pair Loose Stones
Sold out Myanmar orange jade (jade) 0.584ct 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.