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Emerald Hunter Masahiro Shimizu Collection

Mr. Masahiro Shimizu, an emerald hunter, became a hot topic after appearing on TBS TV's ``Matsuko's Unknown World.'' These are rough and loose Colombian emeralds purchased directly from Mr. Shimizu. Colombian emeralds have a unique beauty and depth, with their colors and characteristics changing depending on the mine. Please enjoy Mr. Shimizu's captivating charm that continues to tickle your curiosity.

Karatz GemMagazine
" Interview with Emerald Hunter Masahiro Shimizu "

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coming soon Colombian Trapiche Emerald 0.422ct Loose
Sold out [On sale April 19 at 10 PM JST] Colombian Mica in Emerald Loose Stone 1.314ct
Sold out コロンビア産パイライト付きエメラルド 0.590ct原石
Sold out コロンビア産パイライト付きエメラルド 1.040ct原石
Sold out コロンビア産エメラルド 0.961ctルース(バイカラー)
Sold out コロンビア産バイカラーエメラルド 1.380ct原石
Sold out コロンビア産パイライト・雲母インエメラルド 4mm/0.275ct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 コロンビア産トラピッチェエメラルド 0.424ct原石
Sold out コロンビア産エメラルド 0.202ct原石
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 コロンビア産エメラルド 1.707ct原石
Sold out コロンビア産パイライト・雲母インエメラルド 0.901ctルース
Sold out コロンビア産エメラルド 0.350ct原石
Sold out コロンビア産パイライト・雲母インエメラルド 0.649ctルース
Sold out Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)
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) 0.108ct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) 0.084ct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) 0.053ct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) 0.107ct原石
Sold out コロンビア産ノンオイルエメラルド 0.535ct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) 0.147ct原石
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) 0.329ct原石

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.