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 "

Sold out

Limited to 10 stones! Pigeon Blood Ruby (normally priced at 39,800 yen) Red Gemstone Gacha with AIGS Certificate (Multiple purchase discounts available)

Sold out

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Sold out

Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available

Sold out

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

Sold out

[On sale June 7th at 10 PM] Limited to 10 stones: Flower-cut gem gacha 💎 Cherry blossom shape normally 39,800 yen, and a ruby with a new cut (plus an extra new cut) 《Multiple purchase discount available》

Sold out

Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available

Sold out

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

Sold out

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

Sold out

[12563504 Listed] Unheated Pigeon Blood Ruby from Burma 0.300ct Loose

Sold out

[On sale July 4, 10 PM] Burmese Ruby 3.1mm/0.120ct Loose Stone with Certificate

Sold out

[For sale on July 4th at 10 PM] Mozambique Ruby 0.300ct Loose Stone with Gemstone Report

Sold out

[On sale July 5th at 10 PM] Mozambique Ruby 0.415ct Loose Stone with Appraisal

Sold out

[Sale on June 12 at 10 PM] Ruby 0.496 ct Loose Stone (Hokikyō)

Sold out

[On sale May 30th at 10 PM] [Colorfri] K18 Synthetic Ruby / Synthetic Spinel Pendant Top (Necklace Top) with Certificate of Authenticity

Sold out

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Sold out

Unheated Pigeon Blood Ruby 0.260ct Loose Stone AIGS

Sold out

Ruby 0.289ct loose stone by Takakikyo

Sold out

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

Sold out

Ruby 3.3mm/0.171ct Loose

Sold out

Pigeon blood ruby 0.310ct loose

Sold out

Pigeon's Blood Ruby 4.0mm/0.230ct Loose AIGS

Sold out

Ruby 0.258ct loose

Sold out

Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity

Sold out

Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan

Sold out

Unheated star ruby from Myanmar, 0.617ct loose

Sold out

Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS

Sold out

Mozambique ruby 0.537ct loose stone

Sold out

Myanmar trapichel ruby 0.179ct rough stone

Sold out

Myanmar trapichel ruby 0.160ct rough stone

Sold out

Unheated Ruby from Myanmar 0.433ct Ruth Japanese-German Edition

Sold out

Trapichel ruby from Myanmar 0.202ct rough stone

Sold out

Myanmar trapichel ruby 0.152ct rough stone

Sold out

Myanmar trapichel ruby 0.261ct rough stone

coming soon

Unheated Pigeon Blood Ruby from Myanmar, 0.640ct Loose, AIGS Sale price¥258,000

Sold out

Greenland Ruby 0.737ct Loose Stone with Certificate

Sold out

Pigeon Blood Ruby 3.7mm/0.230ct Loose Stone AIGS

Sold out

Greenland Ruby 3.2mm/0.152ct Loose Stone with Certificate

Sold out

Ruby 0.224ct loose

Sold out

Greenland Ruby 3.6mm/0.220ct Loose Stone with Certificate

Sold out

Greenland Ruby 3.0mm/0.134ct Loose Stone with Certificate

Sold out

Unheated Pigeon Blood Ruby 0.300ct Loose

Sold out

Pigeon Blood Ruby 0.930ct Loose

Sold out

Sri Lankan Star Ruby 0.496ct Loose Stone with Certificate of Authenticity

Sold out

Unheated ruby 0.130ct loose

Sold out

K18PG モザンビーク産ルビー 0.195ct ペンダントトップ（ネックレストップ）

18KPG Mozambique Ruby 0.195ct Pendant (Necklace)

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.