Birthstone list

Paraiba tourmaline from Brazil 0.204ct loose Sale price¥29,800

Paraiba tourmaline from Brazil 0.239ct loose Sale price¥45,800

Paraiba tourmaline from Brazil 0.232ct loose Sale price¥45,800

ブラジル産パライバトルマリン 0.240ctルース（CuO:0.7%、MnO:3.8%）

Paraiba tourmaline from Brazil 0.240ct loose (CuO:0.7%, MnO:3.8%) Sale price¥45,800

Brazilian Pink Imperial Topaz 1.907ct Loose Japanese-German Edition Sale price¥98,000

Russian demantoid garnet (horsetail recognized) 0.214ct loose Sale price¥49,800

Colombian mica in emerald 1.314ct loose Sale price¥39,800

ロシア産デマントイドガーネット（ホーステール認む） 4.2mm/0.336ctルース

Russian demantoid garnet (horsetail recognized) 4.2mm/0.336ct loose Sale price¥79,800

【KEN氏】メキシコ産オパール 8mm/1.430ctルース - カラッツSTORE

Mexican Opal 8mm/1.430ct Loose Sale price¥25,800

Bicolor tourmaline 1.248ct loose Sale price¥6,980

Bicolor tourmaline 1.097ct loose Sale price¥5,980

Australian opal 14.837ct loose Sale price¥98,000

Trapiche emerald 0.650ct loose (reverse trapiche) Sale price¥6,980

Pink sapphire 0.934ct loose Sale price¥15,800

【KEN氏】メキシコ産ファイアオパール 1.580ctルース - カラッツSTORE

Mexican Fire Opal 1.580ct Loose Sale price¥25,800

[Sold at 10pm on September 15th] Blue sapphire 0.591ct loose stone Sale price¥9,800

【さくらインカット】メキシコ産オパール 9mm/1.532ctルース - カラッツSTORE

[Sale at 10 PM on September 15th] [Sakura In-Cut] Mexican Opal 9mm/1.532ct Loose Sale price¥45,800

[On Sale 10/12 at 10 PM] [Limited to 10 stones] Unheated Sapphire (3.5mm, Round Cut) from Theppanawa Mine, Sri Lanka (Loose) [Multiple Purchase Discounts Available] Sale price¥4,980

[On Sale at 10 PM on September 11th] Colombian Emerald 0.222ct Loose Sale price¥59,800

ロシア産デマントイドガーネット（ホーステール認む） 4.4mm/0.394ctルース

Russian demantoid garnet (horsetail recognized) 4.4mm/0.394ct loose Sale price¥69,800

ロシア産デマントイドガーネット（ホーステール認む） 4.6mm/0.423ctルース

Russian demantoid garnet (horsetail recognized) 4.6mm/0.423ct loose Sale price¥79,800

ブラジル産パライバトルマリン 0.134ctルース（CuO:0.8%、MnO:2.3%）

Paraiba tourmaline from Brazil 0.134ct loose (CuO:0.8%, MnO:2.3%) Sale price¥25,800

Green sapphire 7.545ct loose (spade cut) Sale price¥59,800

Watermelon tourmaline 44.201ct Ruth Japanese-German book Sale price¥398,000

Bicolor tourmaline 3.277ct loose Sale price¥9,800

Particolor tourmaline 32.207ct loose (tricolor tourmaline) Sale price¥398,000

Cantera opal 17.284ct loose Sale price¥29,800

Fire opal 1.360ct loose Sale price¥9,800

ロシア産デマントイドガーネット（ホーステール認む） 5.8mm/0.876ctルース

Russian demantoid garnet (horsetail recognized) 5.8mm/0.876ct loose Sale price¥258,000

Pink tourmaline 0.391ct loose Sale price¥4,980

ロシア産デマントイドガーネット（ホーステール認む） 5.3mm/0.633ctルース

Russian demantoid garnet (horsetail recognized) 5.3mm/0.633ct loose Sale price¥198,000

Mexican Topaz 1.50ct Loose Sale price¥9,800

Bangkacha sapphire (star sapphire) 69.655ct loose Sale price¥148,000

【NOBU氏】アマゾン産グリーンオパール《コラボ》6.8mmルース - カラッツSTORE

[Mr. NOBU] Green Opal from Amazon [Collaboration] 6.8mm loose Sale price¥6,980

[Cat cut] Amazon green opal 6.5mm/0.580ct loose Sale price¥6,980

Conch pearl 0.390ct loose (pink white color) Sale price¥18,800

[Koshu precious stone Kiriko plusthree] Light citrine 2.490ct loose with patch Sale price¥25,800

[On sale at 10 PM on September 9th] 18K Yellow Gold Tanzanian Kornerupine 0.217ct Aquamarine Ring Sale price¥89,800

タンザニア産アンデシン・ラブラドライト（通称名ブルームーンストーン） 0.726ctルース

[Available at 10 PM on September 9th] [Dandelion Cut] Tanzanian Andesine Labradorite (also known as Blue Moonstone) 6.0mm/0.726ct Loose Stone Sale price¥49,800

[On Sale at 10 PM on September 16th] Brazilian Indigolite Tourmaline 4.0mm/0.240ct Loose Stone with Certificate of Authenticity Sale price¥29,800

[12560308] Brazilian indigolite tourmaline 0.609ct loose stone Sale price¥25,800

[Sold at 10pm on September 26th] Tanzanian Almandine Garnet 2.992ct Loose Stone, Japan-Germany Qualification Sale price¥15,800

[Sold at 10pm on September 26th] Tanzanian Almandine Garnet 3.089ct Loose Stone, Japan-Germany Qualification Sale price¥18,800

[On sale at 10pm on September 14th] Brazilian Imperial Topaz 0.563ct Loose Sale price¥15,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.321ctルース

[10/11 22:00] Rainbow Garnet from Tenkawa Village, Nara Prefecture, 3.9mm/0.321ct Loose Stone (Rose Cut) Sale price¥8,800

[On Sale at 10 PM on September 14th] Tanzanian Rhodolite Garnet 0.801ct Loose Stone Sale price¥9,800

[On Sale at 10 PM on September 26th] Tanzanian Rhodolite Garnet 0.405ct Loose Stone Sale price¥6,980

[Sold at 10 PM on September 7th] Pt900 Brazilian Swiss Blue Topaz 0.41ct Cat Cut Earrings Sale price¥19,800

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.