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 "

[On Sale at 10 PM on September 11th] Unheated Pigeon Blood Ruby 0.300ct Loose Stone AIGS Sale price¥79,800

Pigeon Blood Ruby 0.590ct Loose AIGS Sale price¥55,800

[On sale at 10 PM on September 13th] Limited to 8 stones: Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) [Multiple purchase discounts available] Sale price¥4,980

[On Sale at 10 PM on September 6th] Pigeon Blood Ruby 5.2mm/0.930ct Loose Stone AIGS Sale price¥198,000

[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》 Sale price¥2,280

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 Sale price¥3,980

Unheated ruby 0.130ct loose Sale price¥25,800

[Available at 10 PM on August 28th] Pigeon Blood Ruby 0.280ct Loose Stone AIGS Sale price¥49,800

Ruby 0.213ct loose Sale price¥7,980

Ruby 0.182ct loose Sale price¥5,980

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

Ruby from Greenland 0.268ct loose with certificate Sale price¥18,800

Ruby from Greenland 0.421ct loose with certificate Sale price¥18,800

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 Sale price¥12,800

Ruby 0.258ct loose Sale price¥18,800

Burmese Ruby 3.725ct Loose GIA & Chuho Sale price¥198,000

Star Ruby 0.461ct Loose Stone with Certificate Sale price¥18,800

Sri Lankan Star Ruby 0.564ct Loose Stone with Certificate Sale price¥24,800

Ruby 4.0mm/0.305ct loose stone Sale price¥45,800

K18YG Myanmar Ruby, Padparadscha Color Sapphire, Yellow Diamond Pendant (Necklace) Sale price¥98,000

Unheated Mozambique Ruby 0.220ct Loose Sale price¥25,800

Unheated Ruby 0.330ct Loose AIGS Sale price¥35,800

Burmese Ruby 0.418ct Loose Stone Japan-Germany Sale price¥35,800

Burmese unheated ruby 0.245ct loose stone by Nikkei Sale price¥39,800

Myanmar Ruby 0.283ct Loose Sale price¥29,800

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 Sale price¥1,980

Pakistan Ruby in Quartz 1.429ct Loose Stone Sale price¥12,800

Ruby 0.284ct loose Sale price¥15,800

Ruby 0.273ct loose stone Sale price¥13,800

Ruby 0.173ct loose stone Sale price¥12,800

Ruby 0.248ct loose Sale price¥12,800

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

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

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 Sale price¥19,800

Ruby 0.289ct loose stone by Takakikyo Sale price¥12,800

Pigeon Blood Ruby 0.295ct Loose AIGS Sale price¥49,800

Myanmar Trapiche Ruby 0.250ct Loose Sale price¥15,800

Myanmar Trapiche Ruby 0.342ct Loose Sale price¥15,800

Myanmar trapichel ruby 0.216ct loose Sale price¥15,800

Ruby 0.106ct loose Sale price¥12,800

Myanmar Trapiche Ruby 0.200ct Loose Sale price¥12,800

Ruby 0.282ct loose Sale price¥8,800

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.

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.