Ruby

Ruby is the birthstone of July. It is a type of corundum, the same mineral as sapphire, and is a red gemstone. It is also said to be the representative of red gemstones, and has a long history of being cherished all over the world since ancient times. With a hardness of 9, it is the second hardest after diamond and is highly durable, making it a gemstone that can be enjoyed on a daily basis as jewelry.

Karatz GemMagazine
" Ruby "

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Ruby from Greenland 0.544ct loose with certificate

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Ruby from Greenland 0.685ct loose with certificate

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Ruby from Greenland 0.440ct loose with certificate

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Ice ruby from Greenland (pink sapphire) 0.454ct loose with certificate

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Ruby from Greenland 0.452ct loose with certificate

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Unheated ruby from Mozambique 0.380ct loose GIA

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Ruby 0.678ct Ruth Japanese-German book

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Pigeon blood ruby 0.366ct loose Japanese-German book

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Ruby from Greenland 2.3mm/0.063ct loose with certificate

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Ruby from Greenland 2.3mm/0.056ct loose with certificate

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Ruby from Greenland 2.3mm/0.054ct loose with certificate

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Ruby from Greenland 2.3mm/0.056ct loose

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Ruby from Greenland 2.3mm/0.055ct loose with certificate

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Ice ruby from Greenland 3.4mm/0.193ct loose with certificate

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Star Ruby 0.886ct loose

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Ruby 0.169ct loose

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Ruby 0.143ct loose

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Ruby 0.153ct loose

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Ruby 0.121ct loose

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Ruby 0.146ct loose

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Ruby 0.187ct loose

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Ruby 2.8mm/0.117ct loose

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Ruby 0.219ct loose

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Ruby 0.327ct loose

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Ruby 0.300ct loose

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Ruby in hook site from India 11.734ct loose with emblem

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Pigeon blood ruby 1.180ct loose AIGS

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Pigeon blood ruby 1.530ct loose AIGS

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Pigeon blood ruby 0.70ct loose AIGS

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Burmese unheated ruby 1.234ct loose

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Ruby from Greenland 0.726ct loose with certificate

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Ruby 0.537ct Ruth Japanese and German

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Ruby 0.381ct Ruth Japanese and German

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Unheated star ruby from Vietnam 1.490ct loose GIA

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Unheated ruby from Mozambique 0.270ct loose GIA

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Unheated ruby from Mozambique 0.240ct loose GIA

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Pigeon blood ruby 0.950ct loose AIGS

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Star Ruby 0.866ct loose

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Ruby from Mozambique 5mm/0.591ct loose (round)

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Ruby 3.5mm/0.284ct loose (round)

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Ruby 0.250ct loose

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Ruby from Burma 3.5mm/0.262ct loose (round cut)

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Ruby from Burma 3.5mm/0.256ct loose

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Ruby from Burma 4mm/0.399ct loose (round)

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Ruby from Burma 4mm/0.382ct loose

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Ruby from Burma 4mm/0.378ct loose

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Thai pigeon blood ruby 0.240ct loose (pear shape) AIGS

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Ruby from Burma 0.684ct loose (oval)

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