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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Afghanistan Oil-Free Emerald 0.040ct Loose GIA

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Emerald 0.286ct loose

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Colombian emerald 0.840ct rough stone

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[12551956] Colombian emerald rough stone 1.241ct

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[Published on 12551244] Jadeite 0.656ct loose stone

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[12551959] Colombian emerald 0.529ct rough stone

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Colombian Mica in Emerald 4.9mm/0.454ct Loose Stone

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Colombian Trapiche Emerald 0.152ct Loose

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[12552119] Colombian mint color emerald 0.462ct loose stone

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Colombian Mica in Emerald 4.6mm/0.360ct Loose Stone

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Afghanistan non-oil emerald 0.150ct loose stone (NONE) GIA

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Colombian emerald 0.433ct rough stone

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[E_27 Yurakucho Marui Take-out] Colombian mint color emerald 0.224ct loose stone

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Emerald 0.483ct loose stone

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Colombian pyrite in emerald 0.204ct loose stone

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Colombian mint color emerald 0.206ct loose stone

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Colombian mint color emerald 0.252ct loose stone

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Colombian mint color emerald 0.282ct loose stone

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Colombian mint color emerald 1 loose stone {Multiple purchase discount available}

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Colombian mint color emerald 0.122ct loose stone

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Colombian mint color emerald 0.430ct loose stone

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Colombian mint color emerald 4.5mm/0.407ct loose stone

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Colombian mint color emerald 0.429ct loose stone

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[E_27 Yurakucho Marui Take-out] Colombian mint color emerald 0.218ct loose stone

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Colombian mint color emerald 0.197ct loose stone

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Colombian mint color emerald 0.167ct loose stone

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Colombian emerald with pyrite 5.031ct rough stone

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Colombian emerald 0.130ct rough stone

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Colombian emerald 0.127ct rough stone

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Colombian emerald 0.140ct rough stone

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Colombian emerald 0.144ct rough stone

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Colombian emerald 0.422ct rough stone

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Colombian emerald 0.386ct rough stone

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Colombian emerald 0.700ct rough stone

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Colombian emerald rough stone 2.997ct

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Colombian emerald 3.5mm/0.187ct loose stone with jewel

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[E_27 Yurakucho Marui Take-out] Colombian emerald 0.175ct loose stone with precious stone

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Colombian pyrite emerald 0.816ct loose stone

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Colombian emerald rough stone 0.139ct

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Colombian emerald 0.164ct rough stone

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Colombian emerald 0.197ct rough stone

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Colombian emerald 0.177ct rough stone

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Colombian emerald 0.410ct rough stone (bicolor)

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Colombian emerald 1.349ct loose stone

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Colombian pyrite-mica emerald 0.523ct loose stone

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Colombian pyrite emerald 1.565ct loose stone

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Colombian Pyrite Mica Emerald 9.6mm/1.959ct Loose Stone

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Colombian pyrite-mica emerald 0.667ct loose stone

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments