Less than 1.0ct

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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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[Mr. Sanje] Mexican Opal 0.180ct Loose (Contrarus Opal, Faceted Cut)

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[Mr. Sanjay] Kyanite from Nepal 0.544ct loose

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[Mr. Sanjay] Kyanite from Nepal 0.452ct loose

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[Mr. Sanjay] Kyanite from Nepal 0.451ct 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 0.182ct loose

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Brazilian Santa Maria Aquamarine 0.209ct loose stone, taken from Yurakucho Marui 2024112

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Brazilian Santa Maria Aquamarine 0.181ct loose

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Brazilian Santa Maria Aquamarine 0.165ct loose

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Santa Maria Aquamarine from Brazil 0.143ct loose

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

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Brazilian Santa Maria Aquamarine 0.108ct loose

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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 0.064ct loose (SI class equivalent)

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

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

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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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[Mr. Sanjay] Lepidocrocite in quartz 0.644ct loose

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[Mr. Sanjay] Cobalt Garnite 2.1mm/0.068ct Loose

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[Mr. Sanjay] Cobalt Garnite 0.067ct Loose

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[Mr. Sanjay] Cobalt Garnite 2.1mm/0.060ct Loose

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Paraiba tourmaline from Brazil 0.023ct loose

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Bekily Blue Garnet from Madagascar (color change garnet) 0.197ct loose

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Synthetic Alexandrite 0.264ct Loose Stone

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Synthetic Alexandrite 0.481ct 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