New stock

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Mexican Fire Opal 0.244ct Loose (Faceted Cut)

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Mexican Fire Opal 0.266ct Loose (Faceted Cut)

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Pink zoisite 0.758ct loose Japanese-German book

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Unheated pink sapphire 0.488ct loose

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Tagtupite from Greenland 0.152ct loose

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Tagtupite from Greenland 0.103ct loose

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Rough diamond (sawable) 0.094ct rough stone (equivalent to VS-SI class)

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[Sakura Incut] Mexican water opal 6mm/0.493ct loose with patch Japanese and German

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Black Star Sapphire 9.650ct loose

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ミントグリーンダイヤモンド1石ルース（トリリアントカット,SIクラス相当）《複数購入割引有》

[Limited to 9 stones] 1 mint green diamond loose (trilliant cut, SI class equivalent) [Multiple purchase discount available]

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ライトミントグリーンダイヤモンド1石ルース（2.0mm,VS-SI）《複数購入割引有》

1 light mint green diamond loose (2.0mm, VS-SI)《Multiple purchase discount available》

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[Mr. Sanjay] Kyanite from Nepal 0.544ct loose

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[Mr. Sanjay] Kyanite from Nepal 0.451ct loose

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[Mr. Sanjay] Kyanite from Nepal 0.452ct loose

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[Mr. Sanjay] Yellow sapphire from Sri Lanka 0.846ct loose

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[Mr. Sanjay] Yellow sapphire from Sri Lanka 0.548ct loose

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Cambodian blue zircon (Ratanakiri blue) 0.450ct loose

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[Mr. Sanjay] Cambodian blue zircon (Ratanakiri blue) 0.439ct loose

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[Mr. Sanjay] Violet spinel 0.299ct loose

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[Mr. Sanjay] Gray Spinel (Platinum Spinel) 0.376ct Loose

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[Mr. Sanjay] Pakistani oil-in quartz 0.446ct loose

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Pakistani oil-in quartz 0.290ct loose

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Santa Maria Aquamarine from Brazil 0.214ct loose

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Brazilian Santa Maria Aquamarine 0.181ct loose

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Santa Maria Aquamarine from Brazil 0.143ct loose

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Brazilian Santa Maria Aquamarine 0.108ct loose

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Peridot green diamond (treatment) 0.071ct loose (equivalent to VS class)

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Canary Yellow Diamond (Treatment) 0.097ct Loose (SI class equivalent)

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Canary yellow diamond (treatment) 0.084ct loose (equivalent to VS class)

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Diamond (treatment) 0.052ct loose (equivalent to VS class)

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Mint green diamond (treatment) 0.043ct loose (equivalent to VS class)

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Light mint green diamond (treatment) 2.6mm/0.074ct loose (VS-SI class equivalent)

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Ice green diamond 2.8mm/0.090ct loose (equivalent to VS class)

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Ice green diamond 2.7mm/0.087ct loose (equivalent to VS class)

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Ice blue diamond 0.051ct loose (equivalent to VS class)

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Ice blue diamond 0.064ct loose (SI class equivalent)

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Andesine Labradorite (commonly known as Rainbow Moonstone) 0.117ct loose

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Oil-in-quartz 39.072ct rough stone from Madagascar

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Oil-in-quartz 30.149ct rough stone from Madagascar

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Oil-in-quartz 49.919ct rough stone from Madagascar

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[Mr. Sanjay] Lepidocrocite in quartz 0.976ct loose

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[Mr. Sanjay] Lepidocrocite in quartz 0.811ct loose

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[Mr. Sanjay] Lepidocrocite in quartz 0.895ct loose

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Twin star sapphire from Sri Lanka 2.539ct loose

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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