Login

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 "

Sort by
[Available at 10 PM on March 7th] 18K Yellow Gold Ruby Ring (Pigeon Blood Color)

[Available at 10 PM on March 7th] 18K Yellow Gold Ruby Ring (Pigeon Blood Color) Sale price¥128,000
[Available at 10 PM on February 28th] Limited to 2 stones: One loose Greenland ruby ​​(2.2mm, top color, certificate included) [Multiple purchase discounts available]

[Available at 10 PM on February 28th] Limited to 2 stones: One loose Greenland ruby ​​(2.2mm, top color, certificate included) [Multiple purchase discounts available] Sale price¥8,800
[On Sale at 10 PM on March 8th] Unheated Pigeon Blood Ruby 0.380ct Loose Stone AIGS

[On Sale at 10 PM on March 8th] Unheated Pigeon Blood Ruby 0.380ct Loose Stone AIGS Sale price¥79,800
[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 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
Ruby 0.289ct loose stone by Takakikyo

Ruby 0.289ct loose stone by Takakikyo Sale price¥12,800
[Available at 10 PM on 2/8] 18K Gold and Silver Thai Pigeon Blood Ruby 0.38ct Ring AIGS

[Available at 10 PM on 2/8] 18K Gold and Silver Thai Pigeon Blood Ruby 0.38ct Ring AIGS Sale price¥128,000
[Available at 10 PM on 2/6] Unheated Pigeon Blood Ruby 5.0mm/0.520ct Loose Stone AIGS

[Available at 10 PM on 2/6] Unheated Pigeon Blood Ruby 5.0mm/0.520ct Loose Stone AIGS Sale price¥128,000
[On sale at 10pm on 2/4] Ruby 3.3mm/0.171ct Loose

[On sale at 10pm on 2/4] Ruby 3.3mm/0.171ct Loose Sale price¥39,800
Pigeon blood ruby ​​0.310ct loose

Pigeon blood ruby ​​0.310ct loose Sale price¥98,000
[On Sale 2/7 at 10pm] Pigeon Blood Ruby 4.0mm/0.230ct Loose Stone AIGS

[On Sale 2/7 at 10pm] Pigeon Blood Ruby 4.0mm/0.230ct Loose Stone AIGS Sale price¥69,800
[On Sale at 10 PM on January 20th] Sri Lankan Star Ruby 5.0mm/1.062ct Loose Stone with Certificate of Authenticity

[On Sale at 10 PM on January 20th] Sri Lankan Star Ruby 5.0mm/1.062ct Loose Stone with Certificate of Authenticity Sale price¥39,800
[On Sale at 10 PM on January 11th] Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity

[On Sale at 10 PM on January 11th] Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity Sale price¥39,800
Mozambique ruby ​​0.537ct loose stone

Mozambique ruby ​​0.537ct loose stone Sale price¥15,800
グリーンランド産ルビー 0.253ctルース

Greenland Ruby 0.253ct Loose Stone with Certificate Sale price¥49,800
グリーンランド産ルビー 0.266ctルース

Greenland Ruby 0.266ct Loose Stone with Certificate Sale price¥22,800
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 Sale price¥25,800
Unheated Pigeon Blood Ruby from Myanmar, 0.640ct Loose, AIGS

Unheated Pigeon Blood Ruby from Myanmar, 0.640ct Loose, AIGS Sale price¥258,000
加熱ルビー 4.5mm/0.430ctルース GIT

Unheated Ruby 4.5mm/0.430ct Loose GIT Sale price¥98,000
グリーンランド産ルビー 0.360ctルース

Greenland Ruby 0.360ct Loose Stone with Certificate Sale price¥69,800
ピジョンブラッドルビー 0.320ctルース AIGS

Pigeon Blood Ruby 0.320ct Loose AIGS Sale price¥48,800
[12559773] Ruby 0.122ct loose stone

[12559773] Ruby 0.122ct loose stone Sale price¥14,800
ピジョンブラッドルビー 0.290ctルース

Pigeon Blood Ruby 4.0mm/0.290ct Loose Stone AIGS Sale price¥59,800
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
ピジョンブラッドルビー 0.280ctルース AIGS

Pigeon Blood Ruby 0.280ct Loose Sale price¥49,800
ピジョンブラッドルビー 0.340ctルース

Pigeon Blood Ruby 0.340ct Loose Sale price¥59,800
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
ビルマ産ルビー 3.72ctルース GIA

Burmese Ruby 3.725ct Loose GIA & Chuho Sale price¥198,000
スタールビー 0.564ctルース

Sri Lankan Star Ruby 0.564ct Loose Stone with Certificate Sale price¥24,800
ルビー 0.305ctルース

Ruby 4.0mm/0.305ct loose stone Sale price¥45,800
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
ビルマ産ルビー 0.418ルース

Burmese Ruby 0.418ct Loose Stone Japan-Germany Sale price¥35,800
ルビー 0.283ルース

Myanmar Ruby 0.283ct Loose Sale price¥29,800
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 0.284ctルース

Ruby 0.284ct loose Sale price¥15,800
ルビー 0.248ctルース

Ruby 0.248ct loose Sale price¥12,800
モザンビーク産非加熱ルビー 0.135ctルース

Unheated Mozambique Ruby 2.7mm/0.135ct Loose Sale price¥19,800
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 Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.

Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts 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 Red Gemstone Gacha including Pigeon Blood Ruby AIGS worth ¥60,000 💎 Ruby and Hot Pink Sapphire (Multiple Purchase Discounts Available)

Red Gemstone Gacha including Pigeon Blood Ruby AIGS worth ¥60,000 💎 Ruby and Hot Pink Sapphire (Multiple Purchase Discounts Available)

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.