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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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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 Sale price¥55,800
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 Sale price¥3,980
[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980
1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280
Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available Sale price¥4,980
Limited to 18 stones: Mozambique ruby ​​(princess cut, 2.3-2.5mm) Multiple purchase discounts available

Limited to 18 stones: Mozambique ruby ​​(princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980
Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available

Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available Sale price¥3,980
Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available

Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available Sale price¥3,980
加熱ルビー 4.5mm/0.430ctルース GIT

[11/3 22:00 Sale] Unheated Ruby 4.5mm/0.430ct Loose GIT Sale price¥98,000
グリーンランド産ルビー 0.737ctルース

[On Sale 11/23 10pm] Greenland Ruby 0.737ct Loose Stone with Certificate Sale price¥45,800
グリーンランド産ルビー 0.360ctルース

[On Sale 11/23 10pm] Greenland Ruby 0.360ct Loose Stone with Certificate Sale price¥69,800
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 Sale price¥39,800
グリーンランド産ルビー 0.210ctルース

Greenland Ruby 3.6mm/0.210ct Loose Stone with Certificate Sale price¥45,800
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 Sale price¥25,800
Ice ruby ​​(pink sapphire) from Greenland 0.416ct loose with certificate

Ice ruby ​​(pink sapphire) from Greenland 0.416ct loose with certificate Sale price¥18,800
Ruby from Greenland 0.268ct loose with certificate

Ruby from Greenland 0.268ct loose with certificate Sale price¥18,800
グリーンランド産ルビー 0.421ctルース

Ruby from Greenland 0.421ct loose with certificate Sale price¥18,800
グリーンランド産ルビー 0.307ctルース 証明書付

Ruby from Greenland 0.307ct loose with certificate Sale price¥15,800
Greenland Pink Sapphire (Ice Ruby) 3.5mm/ 0.217ct Loose Stone with Certificate

Greenland Pink Sapphire (Ice Ruby) 3.5mm/ 0.217ct Loose Stone with Certificate Sale price¥12,800
ルビー 0.258ctルース

Ruby 0.258ct loose Sale price¥18,800
ビルマ産ルビー 3.72ctルース GIA

Burmese Ruby 3.725ct Loose GIA & Chuho Sale price¥198,000
モザンビーク産非加熱ルビー 0.220ctルース

Unheated Mozambique Ruby 0.220ct Loose Sale price¥25,800
非加熱ルビー 0.330ルース

Unheated Ruby 0.330ct Loose AIGS Sale price¥35,800
ビルマ産非加熱ルビー 0.245ルース

Burmese unheated ruby ​​0.245ct loose stone by Nikkei Sale price¥39,800
ビルマ産ルビー 0.239ルース

Burmese Ruby 0.239ct Loose Sale price¥9,800
Limited quantity: 1 impregnated ruby ​​loose (4mm, round cut, identification instructions included) Multiple purchase discounts available

Limited quantity: 1 impregnated ruby ​​loose (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980
パキスタン産ルビーインクォーツ 1.429ctルース

Pakistan Ruby in Quartz 1.429ct Loose Stone Sale price¥12,800
ルビー 0.273ctルース

Ruby 0.273ct loose stone Sale price¥13,800
ミャンマー産トラピッチェルビー 0.125ctルース

Myanmar Trapiche Ruby 2.6mm/0.125ct Loose Stone Sale price¥5,980
ルビー 0.242ctルース

Ruby 0.242ct loose stone Sale price¥14,800
ルビー 0.295ctルース

Pigeon Blood Ruby 0.295ct Loose AIGS Sale price¥49,800
ミャンマー産トラピッチェルビー 0.250ctルース

Myanmar Trapiche Ruby 0.250ct Loose Sale price¥15,800
ミャンマー産トラピッチェルビー 0.342ctルース

Myanmar Trapiche Ruby 0.342ct Loose Sale price¥15,800
ルビー 0.282ctルース

Ruby 0.282ct loose Sale price¥8,800
Sold out 含浸ルビー・天然ルビー見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] 2-piece set for distinguishing impregnated rubies and natural rubies (discount available for multiple purchases)

Sold out Ruby Lottery: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby (Multiple Purchase Discounts Available)

Ruby Lottery: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby (Multiple Purchase Discounts Available)
Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm,ピンクサファイア）《複数購入割引有》

Greenland Ice Ruby 1 stone (heart shape, 4mm, pink sapphire) {Multiple purchase discount available}

Sold out グリーンランド産ルビー 1石（ラウンドカット,2mm）

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

Sold out Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Sold out Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm）

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

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 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 非加熱ピジョンブラッドルビー 0.300ctルース AIGS

Unheated Pigeon Blood Ruby 0.300ct Loose
Sold out ピジョンブラッドルビー 5.2mm/0.930ctルース AIGS

Pigeon Blood Ruby 0.930ct Loose
Sold out スリランカ産スタールビー 0.496ctルース 鑑別書

Sri Lankan Star Ruby 0.496ct Loose Stone with Certificate of Authenticity
Sold out 非加熱ルビー 0.130ctルース GIT

Unheated ruby ​​0.130ct 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.

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.