Coming soon

Limited to 6 stones: 1 loose Madagascar needle-in topaz (average 2.1 carats) Multiple purchase discounts available Sale price¥4,980

Limited to 5 stones Leopard print cat cut KARATZ collaboration (Amber, 8.5mm) Multiple purchase discounts available Sale price¥12,800

[Dandelion cut] Pyrope almandine garnet 9.0mm/3.566ct loose stone Sale price¥35,800

Nepalese Kyanite 1 stone loose (Royal Blue color, 4 x 6mm, oval cut) {Multiple purchase discount available} Sale price¥3,980

Limited to 4 stones: 1 loose silky sapphire from Sri Lanka. Discounts available for multiple purchases. Sale price¥3,980

Limited to 8 stones: 1 Australian rainbow lattice sunstone loose stone (average 0.60ct) Multiple purchase discounts available Sale price¥6,980

Limited to 10 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases. Sale price¥5,980

Limited to 3 stones: Brazilian Trapiche Amethyst (with mother rock) 1 loose stone (average 33ct, February birthstone) Multiple purchase discounts available Sale price¥3,980

Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available} Sale price¥6,980

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） 2.8mm/0.188ctルース

Russian demantoid garnet cat's eye (horsetail recognized) 2.8mm/0.188ct loose Sale price¥25,800

Pakistani Axinite 0.500ct loose stone (green tint) Sale price¥12,800

[Limited to 6 stones] Contains 2 stones in total: 1 gemstone (rough stone) that is actually featured in a gemstone encyclopedia + 1 emerald rough stone. Sale price¥4,980

Sri Lankan saffron 0.320ct loose stone with certificate of authenticity Sale price¥29,800

Limited to 8 stones: 1 loose kite cut stone (illusion sunstone, sapphire, emerald, spessartine garnet, etc.) Multiple purchase discounts available Sale price¥5,980

Spinel 0.705ct loose (rose cut) Sale price¥6,980

Limited to 14 stones: 3mm single unheated sapphire from the Theppanawa mine in Sri Lanka. Discounts available for multiple purchases. Sale price¥5,980

Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available Sale price¥2,980

Limited to 9 stones. All stones come with appraisal certificates. 1 loose zoisite stone (yellow, pink-brown, green, etc.). Discounts available for multiple purchases. Sale price¥6,980

Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available Sale price¥4,980

Limited Edition Synthetic Moissanite Gacha! 💎 Koshu Kiriko Plus Three Moissanite, Sange Cut, Pink, and Blue Moissanite Loose Stones Available. Multiple Purchase Discounts Available. Sale price¥4,980

Limited to 8 stones: Colombian mango quartz (up to 60 carats, average 21.6 carats) [Multiple purchase discounts available] Sale price¥1,980

[On sale November 8th at 10pm] Limited to 4 stones: Carving Gacha (pink tourmaline, average 3.4 carats) 1 loose stone [Multiple purchase discounts available] Sale price¥3,980

[Available at 10 PM on November 15th] Limited Quantity: Single Rough Neon Blue Apatite from Madagascar (Average 2.2 carats) [Multiple Purchase Discounts Available] Sale price¥1,280

[On sale November 15th at 10 PM] [Limited to 7 stones] One loose colorless apatite from Madagascar (all stones come with a certificate of authenticity, average 0.60 carat) [Multiple purchase discounts available] Sale price¥4,980

[On sale at 10 PM on November 15th] Limited to 9 stones: One rough petalite stone from Myanmar (average 6.0 carats) [Multiple purchase discounts available] Sale price¥2,980

[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

Diamond (cabochon cut) 0.206ct loose Sale price¥55,800

Sky blue topaz 1.719ct loose stone Sale price¥9,800

Turkish pink diaspore 0.205ct loose stone Sale price¥12,800

Vietnam Aquamarine 0.461ct Loose Stone Sale price¥5,980

Brazilian Pink Tourmaline 0.862ct Loose Stone Sale price¥15,800

Brazilian dendritic quartz 4.587ct loose stone Sale price¥12,800

アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.585ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.585ct loose stone Sale price¥12,800

Spessartite Garnet from Madagascar 1.053ct loose stone Sale price¥29,800

Australian Rainbow Lattice Sunstone 1.746ct Loose Stone Sale price¥15,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.826ctルース

Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.826ct loose Sale price¥12,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 1.087ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.1mm/1.087ct loose stone Sale price¥16,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 1.030ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.2mm/1.030ct loose stone Sale price¥15,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.838ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.1mm/0.838ct Loose Stone Sale price¥12,800

Vietnam Aquamarine 0.494ct Loose Stone Sale price¥8,800

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥19,800

Mozambique Rubellite 0.410ct Loose Stone Sale price¥15,800

Tanzanian pink tourmaline 0.558ct loose stone Sale price¥12,800

Brazilian Green Tourmaline 2.218ct Loose Sale price¥29,800

Cambodian Blue Zircon 0.744ct Loose Stone Sale price¥8,800

Sri Lankan Yellow Sapphire 0.312ct Loose Sale price¥8,800

Brazilian Blue Tourmaline 0.196ct Loose Sale price¥8,800

Brazilian Indigolite Tourmaline 7.002ct Loose Stone, Japan-Germany Exchange Sale price¥198,000

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.