Birthstone list

[On sale at 10 PM on November 15th] Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) [Multiple purchase discounts available] Sale price¥5,980

[Sales start November 2nd at 10 PM] [Limited to 10 stones] Tanzanite rough gacha including bicolor pink tanzanite rough (average 4.2 carats) [Multiple purchase discounts available] Sale price¥6,980

[On sale November 16th at 10pm] [Limited to 32 stones] Namibian Mandarin Garnet Loose Stone (Round Cut, 2.5mm) [Multiple purchase discounts available] Sale price¥5,980

[On sale November 8th at 10pm] Limited to 9 stones: Carving Gacha (Opal, Tourmaline, Tsavorite Garnet) 1 loose stone [Multiple purchase discounts available] Sale price¥2,980

[On sale November 3rd at 10pm] [Limited to 14 stones] One loose Russian oil-free emerald (2.1mm, square cut) [Multiple purchase discounts available] Sale price¥5,980

【11/24 22時販売】《限定12石》VS相当蛍光ダイヤモンドガチャ・ミニスライスダイヤモンドのおまけ付《複数購入割引有》 Sale price¥6,980

【11/24 22時販売】《限定7石》スリランカ産スターサファイア1石ルース《複数購入割引有》 Sale price¥3,980

[On Sale 11/23 10pm] Madagascar Hot Pink Sapphire 1.120ct Loose GIA Sale price¥158,000

Sri Lankan star sapphire 1.487ct loose Sale price¥8,800

Unheated Ruby from Myanmar 0.433ct Ruth Japanese-German Edition Sale price¥55,800

Aventurine Aquamarine Cat's Eye 1.567ct 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） 5.2mm/0.702ctルース

Russian demantoid garnet (horsetail recognized) 5.2mm/0.702ct loose Sale price¥158,000

Green sapphire 0.518ct loose (teal green) Sale price¥8,800

Paraiba tourmaline from Mozambique 0.243ct loose Sale price¥15,800

Unheated silky pink sapphire from Vietnam 0.426ct loose Sale price¥9,800

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） 2.483ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 2.483ct 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） 1.163ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 1.163ct loose Sale price¥9,800

Montana Sapphire 3mm/0.155ct loose Sale price¥18,800

ロシア産デマントイドガーネットキャッツアイ（ホーステール認む） 2.5mm/0.141ctルース

Russian demantoid garnet cat's eye (horsetail recognized) 2.5mm/0.141ct loose Sale price¥12,800

Trapichel ruby from Myanmar 0.202ct rough stone Sale price¥3,980

ブラジル産パーティカラーパライバトルマリン 0.149ctルース（CuO:1.4%、MnO:2.8%）

Particolor Paraiba tourmaline from Brazil 0.149ct loose (CuO:1.4%, MnO:2.8%) Sale price¥59,800

Colombian trapiche emerald (reverse trapiche) 0.152ct loose Sale price¥12,800

Colombian trapiche emerald (reverse trapiche) 0.099ct loose Sale price¥8,800

Colombian trapiche emerald (reverse trapiche) 0.074ct loose Sale price¥8,800

Colombian trapiche emerald (reverse trapiche) 0.108ct loose Sale price¥9,800

Colombian trapiche emerald (reverse trapiche) 0.084ct loose Sale price¥8,800

Colombian trapiche emerald (reverse trapiche) 0.144ct loose Sale price¥15,800

[12561388] Tanzanian Almandine Garnet 0.902ct Loose Stone Sale price¥12,800

[12561386] Tanzanian Almandine Garnet 0.993ct Loose Stone Sale price¥12,800

[12561384] Tanzanian Almandine Garnet 0.656ct Loose Stone Sale price¥8,800

[12561382] Tanzanian Bicolor Sapphire 0.380ct Loose Sale price¥18,800

[12561379] Brazilian Bicolor Tourmaline 4.497ct Loose Sale price¥69,800

[On Sale 11/18 10pm] Brazilian Green Tourmaline 5.0mm/0.401ct Loose Stone (Rose Cut) Sale price¥9,800

Kenyan gold sheen sapphire 2.3mm/0.083ct loose Sale price¥8,800

[11/18 22:00 Sale] Russian Demantoid Garnet (Horsetail Certified) 3.8mm/0.249ct Loose Stone Sale price¥39,800

Sapphire from Madagascar 4.5mm/0.414ct loose Sale price¥12,800

Sapphire from Madagascar 4.3mm/0.398ct loose Sale price¥12,800

Pink sapphire from Mozambique 0.213ct loose (hot pink sapphire) Sale price¥9,800

Colombian trapiche emerald (reverse trapiche) 0.196ct loose Sale price¥15,800

Colombian trapiche emerald (reverse trapiche) 0.094ct loose Sale price¥9,800

Wood opal 24.319ct loose Sale price¥45,800

GGG (Gadolium Gallium Garnet) 0.675ct Loose Stone Sale price¥8,800

[11/15 22:00 Sale] GGG (Gadolium Gallium Garnet) 6.4mm/2.380ct Loose Stone Sale price¥18,800

[11/22 22:00] Sri Lankan Hessonite Garnet 1.968ct Loose Stone Sale price¥12,800

[11/14 22:00 Sale] Brazilian Rose Amethyst 0.793ct Loose Stone Sale price¥15,800

Brazilian bicolor tourmaline 2.047ct loose Sale price¥29,800

[12544901 published] Bicolor sapphire 1.000ct loose Sale price¥15,800

[12544897 published] Bicolor sapphire 1.341ct loose Sale price¥29,800

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.