July birthstone

July's birthstone is Ruby Sphene .

Ruby can be said to be the representative of red gemstones. It is a gem that has been loved all over the world since ancient times. In fact, it belongs to the same mineral corundum as the striking blue sapphire. Corundum is said to be the second hardest material after diamond, and due to its durable properties, it can be enjoyed as everyday jewelry. The stronger the red and the more vivid the color, the more valuable it is, and the highest quality is called "pigeon blood."

Sphene is a gemstone that is also known for emitting dispersed light (fire) that is stronger than diamond. One of its characteristics is that it is highly pleochroic, showing different hues depending on the viewing angle. Depending on the angle of light, fire and pleochroism can appear at the same time, giving it an enchanting beauty that captivates the viewer.

Karatz GemMagazine
" List of July birthstones and birthstones "

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1 Ruby from Greenland (round cut, 2mm) with certificate

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[Limited to 14 stones] 1 stone Sphene from Madagascar (3.5mm) [Discount available for multiple purchases]

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Sphene 2 stones in different colors

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《Limited to 5 stones》1 stone Sphene from Madagascar《Multiple purchase discount available》(Mr. Sanjay cut)

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Ice ruby from Greenland 1 stone (heart shape, 4mm) Comes with original pouch

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[On sale 11/2 at 10pm] Burmese ruby 0.220ct loose

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Limited to 1 set: Pair of two Myanmar rubies, Sanjay cut

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Madagascar Sphene 4.6mm/0.485ct Loose Stone

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K18 Madagascar sphene 0.57ct, benitoite 0.061ct ring

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Mozambique Ruby 0.162ct Loose

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Ruby 0.226ct loose

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Pakistani vanadium sphene 1.190ct loose stone

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Myanmar trapichel ruby 0.288ct loose

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Myanmar Trapiche Ruby 0.129ct loose stone

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Ruby 0.266ct loose

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Chrome Sphene 0.253ct loose

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Ruby 0.730ct Ruth Japanese-German book

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Ruby from Tanzania 0.249ct Ruth Japanese German edition

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Ruby from Tanzania 0.233ct Ruth Japanese German edition

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Sphene from Madagascar 6.608ct loose

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Sphene from Madagascar 0.725ct loose (hexagonal cut)

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Ruby from Greenland 0.671ct loose with certificate

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Unheated pigeon blood ruby 0.280ct loose AIGS

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Unheated pigeon blood ruby from Mozambique 0.460ct loose AIGS

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Pigeon blood ruby 0.200ct loose AIGS

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Unheated Pigeon Blood Ruby 0.530ct Loose AIGS

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Unheated Ruby from Myanmar 0.420ct Ruth Japanese-German Edition

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非加熱モザンビーク産ピジョンブラッドルビー 4mm/0.360ctルース AIGS

Unheated Pigeon Blood Ruby from Mozambique 4mm/0.360ct Ruth AIGS

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Myanmar trapichel ruby 0.212ct rough stone

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Myanmar trapichel ruby 0.165ct rough stone

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Myanmar trapichel ruby 0.231ct rough stone

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Trapichel ruby from Myanmar 0.172ct rough stone

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Myanmar trapichel ruby 0.249ct rough stone

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Myanmar trapichel ruby 0.233ct rough stone

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Myanmar trapichel ruby 0.248ct rough stone

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Trapichel ruby from Myanmar 0.114ct rough stone

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Myanmar trapichel ruby 0.225ct rough stone

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Myanmar trapichel ruby 0.197ct rough stone

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Unheated ruby from Vietnam 0.247ct loose

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Burmese unheated pigeon blood ruby 3.6mm/0.28ct loose AIGS

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Unheated ruby from Madagascar 0.315ct loose (with black rutile)

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Unheated ruby from Madagascar 0.355ct loose (with black rutile)

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Pigeon blood ruby 0.900ct loose AIGS

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Unheated pigeon blood ruby 0.360ct loose

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Unheated pigeon blood ruby 0.210ct loose

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Thai pigeon blood ruby 0.430ct loose AIGS

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Ruby from Greenland 0.526ct loose with certificate

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Sphene from Madagascar 0.293ct loose

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