Less than 0.5ct

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Bekily Blue Garnet from Madagascar (color change garnet) 0.090ct loose

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Yellow diamond rough stone (sawable) 0.097ct rough stone

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Montana Sapphire 0.298ct loose (teal green)

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Montana Sapphire 0.302ct loose (blue sapphire)

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Auinite 2.1mm/0.045ct loose

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Hackmanite from Afghanistan 0.178ct loose

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Afghanistan Hackmanite 0.224ct loose stone

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Afghanistan Hackmanite 0.123ct loose stone

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Lazurite from Pakistan 0.151ct loose

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Pakistani Lazurite (Azurite) 0.125ct loose stone

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Pakistani Lazurite (Azurite) 0.114ct loose stone

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Pakistani Lazurite (Azurite) 0.080ct Loose Stone

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Lazurite from Pakistan 0.103ct loose

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Montana Sapphire 0.321ct Loose (Orange Sapphire)

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Montana Sapphire 0.392ct Loose (Bi-Color Sapphire)

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Indian alexandrite cat's eye 0.246ct loose

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Silky pink spinel 0.394ct loose

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Paracytic peridot 3.8mm/0.288ct loose

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Montana Sapphire 0.386ct loose (green sapphire)

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Montana Sapphire 0.388ct loose (white sapphire)

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Montana Sapphire 0.441ct loose (bicolor sapphire)

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Montana Sapphire 0.386ct loose (teal green sapphire)

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Montana Sapphire 0.472ct loose (blue green sapphire)

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Australian rainbow lattice sunstone 0.313ct loose

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[Mr. Sanjay] Madeira Citrine 0.096ct Loose (Princess Cut)

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[Mr. Sanjay] Blue sapphire 0.098ct loose

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[Mr. Sanjay] Blue sapphire 2.7mm/0.089ct loose

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Mexican Opal 0.167ct Loose (Faceted Cut)

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Mexican water opal 0.309ct loose stone (faceted cut)

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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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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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[Mr. Sanjay] Kyanite from Nepal 0.452ct loose

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[Mr. Sanjay] Kyanite from Nepal 0.451ct 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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Peridot green diamond (treatment) 0.071ct loose (equivalent to VS class)

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