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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 コロンビア産エメラルドキャッツアイ 0.217ctルース
Sold out コロンビア産エメラルドキャッツアイ 0.179ctルース
Sold out コロンビア産エメラルド 10.708ct原石
Sold out Limited to 7 stones! May birthstone special offer! Colombian emerald cat's eye, 1 loose stone (highly transparent cat's eye) Multiple purchase discounts available
Sold out 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
Sold out ロシア産ノンオイルエメラルド 0.840ctルース GIA
Sold out コロンビア産エメラルドキャッツアイ 0.083ctルース
Sold out エメラルド 3.1mm/0.117ctルース
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
Sold out コロンビア産エメラルド 2.680ct原石
Sold out コロンビア産エメラルド 0.350ct原石
Sold out コロンビア産エメラルドキャッツアイ 0.079ctルース
Sold out コロンビア産エメラルドキャッツアイ 0.061ctルース
Sold out K18YG コロンビア産エメラルド 0.591ct ペンダント(ネックレス)
Sold out コロンビア産ノンオイルエメラルド 0.170ctルース
Sold out ブラジル産アレキサンドライト 0.098ctルース
Sold out エメラルド 0.138ctルース
Sold out ザンビア産エメラルド 0.182ctルース
Sold out Green Garden 13 Stone Set (Emerald, Demantoid Garnet, Grandidierite, etc.) Half Eternity Ring Set (2.0mm)
Sold out エメラルド 0.354ctルース
Sold out K18YG コロンビア産エメラルド 0.184ct リング
Sold out K18YG コロンビア産エメラルド 0.173ct リング
Sold out Pt900 Colombian emerald 0.60ct diamond 0.19ct ring
Sold out トラピッチェエメラルド 1.341ctルース
Sold out Pt900 コロンビア産エメラルド 0.72ct リング
Sold out ロシア産ノンオイルエメラルド 0.640ctルース GIA
Sold out コロンビア産エメラルド 3.1mm/0.097ct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 0.649ctルース
Sold out コロンビア産エメラルド 0.258ctルース
Sold out コロンビア産エメラルド 0.215ctルース
Sold out コロンビア産トラピッチェエメラルド 0.222ctルース
Sold out コロンビア産パイライト付きエメラルド 40.789ct原石
Sold out ノンオイルエメラルド 0.564ctルース
Sold out コロンビア産エメラルド 1.140ct原石
Sold out ミャンマー産ラベンダー翡翠(ヒスイ) 4.907ctルース
Sold out コロンビア産パイライト付きエメラルド 1.902ct原石
Sold out コロンビア産エメラルド 1.329ct原石
Sold out コロンビア産エメラルド 0.111ct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 0.815ctルース
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) 0.152ct原石
Sold out Colombian emerald 0.625ct rough stone
Sold out コロンビア産エメラルド 0.381ct原石
Sold out ロシア産エメラルド 0.712ctルース
Sold out コロンビア産ノンオイルエメラルド 0.384ctルース
Sold out Colombian emerald 0.057ct loose (Mariposa)
Sold out ブラジル産エメラルド 3.2mm/0.124ctルース
Sold out コロンビア産トラピッチェエメラルド 0.483ctルース

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.