Birthstone list

[12/13 10 PM Sale] {Limited to 13 Stones} Tourmaline Gacha: Including Indigolite Tourmaline worth ¥50,000 and Rubellite worth ¥60,000. Plus, get one Canary Yellow Tourmaline. {Multiple Purchase Discounts Available} Sale price¥5,980

[Available at 10 PM on December 20th] Limited to 11 Stones: Montana Sapphire (Rock Creek Mine) Gacha! 1 Loose Stone (Oval Cut, 5x3mm) [Multiple Purchase Discounts Available] Sale price¥3,980

【12/31 22時販売】《限定15石》ブルー石ガチャ（ブラジル産パライバトルマリン0.157ct・ドイツ産アウイナイト3.5mm・トップクオリティのベニトアイト・パライバトルマリンインクォーツ4.5mm・カスタムカットのアクアマリン）《複数購入割引有》 Sale price¥6,980

【12/31 22時販売】《限定20石》ブラジル産パライバトルマリン(カボションカット約2.2ｍｍ)《複数購入割引有》 Sale price¥9,800

Paraiba tourmaline from Mozambique 0.229ct loose Sale price¥9,800

Brazilian Paraiba tourmaline 0.420ct raw stone (CuO:1.6%, MnO:1.3%) Sale price¥69,800

Colombian emerald cat's eye 0.110ct loose Sale price¥9,800

Diamond 0.052ct loose (trapeze cut, VS class equivalent) Sale price¥6,980

Mexican Fire Opal 4.5mm/0.244ct Loose Sale price¥9,800

Bicolor grossular garnet 0.782ct loose Sale price¥12,800

White topaz 16.06ct loose Sale price¥25,800

Yellow opal 17.283ct loose Sale price¥29,800

Australian boulder opal 4.470ct loose Sale price¥25,800

Brazilian Paraiba tourmaline in quartz 2.954ct loose Sale price¥39,800

Labradorite Moonstone 1.598ct Loose Stone Japanese-German Sale price¥8,800

【32501524掲載】ピンクダイヤモンド 0.070ctルース(FANCY VIVID PINK PURPLE, I-1)

Purple Diamond 0.070ct Loose (FANCY VIVID PINK PURPLE, I-1) Sale price¥188,000

[On Sale at 10 PM on December 21st] Madagascar Bicolor Sapphire 5.8mm/1.006ct Loose Sale price¥12,800

[12/21 22:00] Zambian Bicolor Tourmaline 6.536ct Loose Stone Sale price¥128,000

[12/21 22:00] Zambian Bicolor Tourmaline 4.019ct Loose Stone Sale price¥98,000

[12/21 22:00] Brazilian Bicolor Tourmaline 7.268ct Loose Stone Sale price¥158,000

[12/21 22:00] Mexican Cantera Opal 9.166ct Loose Sale price¥69,800

[12561692] Australian Boulder Opal 2.326ct Loose Sale price¥69,800

[12561694] Australian black opal 1.837ct loose Sale price¥69,800

[12561695] Australian White Opal 1.928ct Loose Sale price¥39,800

[12/21 22:00] Sri Lankan Blue Sapphire 1.008ct Loose Sale price¥69,800

[12561698] Sri Lankan Star Sapphire 11.342ct Loose Sale price¥69,800

[12/21 22:00] Rainbow Garnet (Andradite Garnet) 7.0mm/2.135ct Loose Stone from Tenkawa Village, Nara Prefecture Sale price¥12,800

[12/23 22:00] Australian White Opal 4.170ct Loose Sale price¥69,800

[12561705] Colombian Trapiche Emerald 2.318ct Loose Sale price¥158,000

[12/23 22:00] Mexican Fire Opal 1.413ct Loose Sale price¥39,800

[12/23 22:00] Mexican Fire Opal 1.283ct Loose Sale price¥29,800

[12/23 22:00] Sri Lankan Star Sapphire 3.821ct Loose Sale price¥79,800

[12/23 22:00] Australian Black Opal 2.736ct Loose Sale price¥98,000

[12/23 22:00] Sri Lankan Star Sapphire 5.066ct Loose Sale price¥69,800

[12/22 22:00] Brazilian Green Tourmaline 3.102ct Loose Stone Sale price¥69,800

[12/22 22:00] Sri Lankan Star Sapphire 12.679ct Loose Sale price¥158,000

[12/22 22:00] Mozambique Ruby 0.537ct Loose Sale price¥15,800

【12546396掲載】スリランカ産ゲーサイトイントパーズ 3.200ctルース

Sri Lankan Goethite Into Topaz 3.200ct loose Sale price¥4,980

Australian boulder opal 6.980ct loose Sale price¥6,980

Mexican cantera opal 7.563ct loose Sale price¥15,800

Mexican cantera opal 9.422ct loose Sale price¥25,800

Mexican cantera opal 15.542ct loose Sale price¥15,800

Yellow diamond rough stone (makeable) 0.247ct rough stone Sale price¥22,800

Chrome tourmaline 0.300ct loose stone Sale price¥2,980

[12/13 22:00 Sale] Brazilian Green Tourmaline 0.821ct Loose Stone Sale price¥12,800

[12/12 22:00 Sale] Synthetic Opal 0.856ct Loose (Synthetic Water Opal) Sale price¥8,800

[12/12 22:00 Sale] Mali Garnet (Grossular/Andradite Garnet) 0.741ct Loose Stone from the Republic of Mali with Certificate of Authenticity Sale price¥25,800

[12/10 22:00] Mali Garnet (Grossular/Andradite Garnet) 1.008ct Loose Stone from the Republic of Mali with Certificate of Authenticity Sale price¥35,800

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.