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 "

ピジョンブラッドルビー 0.400ctルース AIGS Sale price¥55,800

ピジョンブラッドルビー 0.40ctルース AIGS Sale price¥49,800

Unheated Mozambique Ruby 0.231ct Loose Sale price¥25,800

[On sale at 10pm on 11/14] Unheated Mozambique ruby 0.220ct loose Sale price¥25,800

[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery Sale price¥6,980

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280

1 heart-shaped ruby 2.5mm《Discount available for multiple purchases》 Sale price¥5,980

1 Ruby from Greenland (heart shape, 4mm)《Discount available for multiple purchases》 Sale price¥5,980

{For beginners} Three major precious stone set💎 Ruby, sapphire, emerald 3 stone set {Multiple purchase discounts available} Sale price¥6,980

Gemstone Encyclopedia Playing Cards + Gemstone Ballpoint Pen Set (Unheated Ruby, Unheated Sapphire, etc.) Sale price¥7,000

Limited to 5 sets: Natural ruby & synthetic ruby 2 stone set (heart shape, sorting included) Multiple purchase discounts available Sale price¥5,980

[On sale from 10pm on November 3rd] [Limited to 18 stones] Mozambique ruby (princess cut, 2.3-2.5mm) [Multiple purchase discounts available] Sale price¥3,980

[On sale 11/3 at 22:00] Unheated Ruby 0.330ct Loose AIGS Sale price¥35,800

[On sale 11/2 22:00] Pigeon Blood Ruby 0.280ct Loose AIGS Sale price¥45,800

[On sale 11/2 at 22:00] Burmese ruby 0.418ct loose stone Japan-Germany Sale price¥35,800

[11/2 22:00 Sale] Burmese Unheated Ruby 0.245ct Loose Stone Nikko Kan Sale price¥39,800

[On sale 11/2 at 10pm] Myanmar ruby 0.283ct loose Sale price¥29,800

[On sale 11/2 at 10pm] Burmese ruby 0.239ct loose Sale price¥9,800

[On sale 11/6 at 22:00] Myanmar Trapiche Ruby 0.230ct loose stone Sale price¥18,800

[On sale from 10pm on November 2nd] Limited quantity: Impregnated ruby 1 loose stone (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980

[On sale 11/8 at 22:00] Pakistani ruby in quartz 1.429ct loose stone Sale price¥12,800

[On sale at 10pm on 10/30] Ruby 0.284ct loose Sale price¥15,800

[On sale at 10pm on 10/30] Ruby 0.245ct loose Sale price¥11,800

[On sale at 10pm on 10/30] Ruby 0.254ct loose Sale price¥8,800

[On sale at 10pm on 10/30] Ruby 0.273ct loose Sale price¥13,800

[On sale at 10pm on 10/30] Ruby 0.173ct loose Sale price¥12,800

[On sale at 10pm on 10/31] Ruby 0.248ct loose Sale price¥12,800

《Yurakucho Marui 2024112 takeout》K18YG Madagascar Padparadscha Sapphire 0.372ct Ruby Pendant (Necklace) Medium Treasure Mirror Sale price¥69,800

《Yurakucho Marui 2024112 Takeout》K18YG Unheated Padparadscha Sapphire 0.61ct, Ruby, Blue Sapphire Ring GIA Sale price¥198,000

Myanmar Trapiche Ruby 2.6mm/0.125ct Loose Stone Sale price¥5,980

Pt950 Burmese Ruby 0.21ct Ruby Ring Sale price¥98,000

Pigeon Blood Ruby 0.44ct Ruby AIGS Sale price¥55,800

Pigeon Blood Ruby 0.40ct Loose AIGS Sale price¥49,800

Pigeon Blood Ruby 0.32ct Loose AIGS Sale price¥49,800

Pigeon Blood Ruby 0.38ct Loose AIGS Sale price¥59,800

Pigeon Blood Ruby 0.40ct Loose AIGS Sale price¥59,800

Pigeon Blood Ruby 0.320ct Loose AIGS Sale price¥69,800

[On sale from 10/25 at 10pm] Pigeon Blood Ruby 0.220ct Loose AIGS Sale price¥45,800

[12551590] Ruby 0.282ct loose stone Sale price¥11,800

Mozambique Ruby 0.244ct Loose Sale price¥9,800

Mozambique Ruby 0.483ct Loose Sale price¥15,800

Mozambique Ruby 0.226ct Loose Sale price¥8,800

Myanmar Trapiche Ruby 0.152ct Loose Sale price¥8,800

《Yurakucho Marui 2024112 takeout》Ruby 0.242ct loose stone Sale price¥14,800

Ruby 0.110ct loose Sale price¥9,800

Unheated Mozambique ruby 2.7mm/0.135ct loose stone Sale price¥19,800

Pigeon Blood Ruby 0.441ct Loose Stone Sale price¥69,800

[10/2 22:00 Sale] Ruby 0.289ct Loose by Takakikyo Sale price¥12,800

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