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7月誕生石

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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Sold out マダガスカル産スフェーン 2.323ctルース

Lottery sale: Madagascar Sphene 2.323ct loose stone with鑑別書

Sold out K18 ルビー 0.44ct・ダイヤモンド0.18ctリング 鑑別書

[Calafuri] K18 Ruby 0.44ct, Diamond 0.18ct Ring with Appraisal Certificate
Sold out ルビー 0.496ctルース

Ruby 0.496 ct Loose Stone (Houseki Kyo)
Sold out マダガスカル産バイカラースフェーン 4.494ctルース

Madagascar Bi-color Sphene 4.494ct Loose Stone

Sold out マダガスカル産スフェーン 0.569ctルース

Madagascar sphene 0.569ct loose stone
Sold out スフェーン 0.503ctルース

Sphene 0.503ct loose stone
Sold out K18 合成ルビー ペンダントトップ（ネックレストップ）

[Calafuri] K18 Synthetic Ruby and Synthetic Spinel Pendant Top (Necklace Top) with Appraisal Report
Sold out Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification
Sold out Unheated Pigeon Blood Ruby 0.260ct Loose Stone AIGS

Unheated Pigeon Blood Ruby 0.260ct Loose Stone AIGS
Sold out Ruby 0.289ct loose stone by Takakikyo

Ruby 0.289ct loose stone by Takakikyo

Sold out 非加熱ピジョンブラッドルビー 0.440ctルース

Untreated Pigeon Blood Ruby 0.440ct Loose AIGS

Sold out Limited to 2 stones: Greenland Ruby, 1 stone, loose (2.2mm, top color, with certificate) (Multiple purchase discount available)

Limited to 2 stones: Greenland Ruby, 1 stone, loose (2.2mm, top color, with certificate) (Multiple purchase discount available)

Sold out K18PG Thai Pigeon Blood Ruby 0.38ct Ring AIGS

K18PG Thai Pigeon Blood Ruby 0.38ct Ring AIGS
Sold out Ruby 3.3mm/0.171ct Loose

Ruby 3.3mm/0.171ct Loose
Sold out Madagascar Sphene 4.5mm/0.509ct Loose Gemstone

Madagascar Sphene 4.5mm/0.509ct Loose Gemstone
Sold out Pigeon blood ruby ​​0.310ct loose

Pigeon blood ruby ​​0.310ct loose
Sold out Pigeon's Blood Ruby 4.0mm/0.230ct Loose AIGS

Pigeon's Blood Ruby 4.0mm/0.230ct Loose AIGS
Sold out Pakistani vanadium sphene 0.759ct loose

Pakistani vanadium sphene 0.759ct loose
Sold out Ruby 0.258ct loose

Ruby 0.258ct loose

Sold out Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity

Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity
Sold out Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan

Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan
Sold out Unheated star ruby ​​from Myanmar, 0.617ct loose

Unheated star ruby ​​from Myanmar, 0.617ct loose
Sold out Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS

Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS
Sold out [Dandelion Cut] Madagascar Sphene 0.950ct Loose Stone

[Dandelion Cut] Madagascar Sphene 0.950ct Loose Stone

Sold out [Dandelion Cut] Madagascar Sphene 6.0mm/0.775ct Loose Stone

[Dandelion Cut] Madagascar Sphene 6.0mm/0.775ct Loose Stone

Sold out Mozambique ruby ​​0.537ct loose stone

Mozambique ruby ​​0.537ct loose stone
Sold out パキスタン産カラーチェンジスフェーン 7.137ctルース

Color change sphene from Pakistan 7.137ct loose
Sold out ミャンマー産トラピッチェルビー 0.179ct原石

Myanmar trapichel ruby ​​0.179ct rough stone
Sold out 【12545153掲載】ミャンマー産トラピッチェルビー 0.160ct原石

Myanmar trapichel ruby ​​0.160ct rough stone
Sold out ミャンマー産非加熱ルビー 0.433ctルース

Unheated Ruby from Myanmar 0.433ct Ruth Japanese-German Edition
Sold out ミャンマー産トラピッチェルビー 0.202ct原石

Trapichel ruby ​​from Myanmar 0.202ct rough stone
Sold out ミャンマー産トラピッチェルビー 0.152ct原石

Myanmar trapichel ruby ​​0.152ct rough stone
Sold out ミャンマー産トラピッチェルビー 0.261ct原石

Myanmar trapichel ruby ​​0.261ct rough stone
Sold out モザンビーク産ルビー 3.4mm/0.139ctルース

Mozambique Ruby 3.4mm/0.139ct Loose Stone
Sold out ジンバブエ産スフェーン 4.7mm/0.400ctルース

Zimbabwean sphene 4.7mm/0.400ct loose stone
Sold out Unheated Pigeon Blood Ruby from Myanmar, 0.640ct Loose, AIGS

Unheated Pigeon Blood Ruby from Myanmar, 0.640ct Loose, AIGS

Sold out グリーンランド産ルビー 0.737ctルース

Greenland Ruby 0.737ct Loose Stone with Certificate
Sold out K18YG マダガスカル産スフェーン 0.597ct ペンダントトップ（ネックレストップ）

18K Yellow Gold Madagascar Sphene 0.597ct Pendant (Necklace)
Sold out ピジョンブラッドルビー 3.7mm/0.230ctルース AIGS

Pigeon Blood Ruby 3.7mm/0.230ct Loose Stone AIGS

Sold out Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate

Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate
Sold out ルビー 0.224ctルース

Ruby 0.224ct loose

Sold out グリーンランド産ルビー 0.220ctルース

Greenland Ruby 3.6mm/0.220ct Loose Stone with Certificate
Sold out グリーンランド産ルビー 0.134ctルース

Greenland Ruby 3.0mm/0.134ct Loose Stone with Certificate
Sold out ジンバブエ産スフェーン 1.028ctルース

Zimbabwean sphene 1.028ct loose stone

Sold out ジンバブエ産スフェーン 0.990ctルース

Zimbabwean sphene 0.990ct loose stone

Sold out マダガスカル産スフェーン 0.711ctルース

Sphene from Madagascar 0.711ct loose

Sold out ジンバブエ産スフェーン 1.057ctルース

Zimbabwean sphene 1.057ct 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.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.