Width: 4.1 - 5.0mm

Vietnam Aquamarine 0.398ct Loose Sale price¥5,980

[Sales on 6/16 at 10 PM] Myanmar Red Spinel 0.578ct Loose Gemstone Sale price¥19,800

[On sale June 14, 10 PM JST] Madagascar Bi-Color Sapphire 4.5mm/0.506ct Loose Stone Sale price¥7,980

[On sale June 13th at 10 PM] Blue Sapphire 0.369ct Loose Stone (with Japan-Germany gemological report) Sale price¥22,800

【On sale June 14, 10 PM】Spanish Andalusite 0.416ct Loose Stone Sale price¥9,800

【Sales start June 14, 10 PM JST】Andalusite from Spain 4.5mm/0.347ct Loose Sale price¥8,800

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

Brazilian Pink Tourmaline 0.470ct Loose Stone Sale price¥9,800

Sri Lankan Star Sapphire 1.339ct Loose Sale price¥12,800

Lavender Tanzanite 0.784ct loose stone Sale price¥12,800

Lepidocrocite in quartz 0.532ct loose Sale price¥6,980

Bicolor tourmaline 0.429ct loose Sale price¥5,980

Bicolor Tourmaline 0.378ct Loose Stone (Hexagonal Cut) Sale price¥8,800

Oregon Sunstone 0.462ct loose Sale price¥5,980

[On Sale June 7, 10 PM] 0.210ct Untreated Colombian Emerald Loose Stone, GIA Certified Sale price¥228,000

[Sale 10 PM JST, June 7] Alexandrite from Odisha, India 0.764 ct Loose Stone with Certificate Sale price¥29,800

[On sale June 8th, 10 PM] India, Orissa Origin Alexandrite 0.760ct Loose Stone with Certification Sale price¥19,800

[On sale June 7th at 10 PM] India Odisha Alexandrite 0.759ct Loose Gemstone with Identification Report Sale price¥22,800

[On Sale June 8th, 10 PM JST] India, Orissa Origin Alexandrite 0.715ct Loose Stone with Certification Sale price¥18,800

インターナリーフローレスダイヤモンド 0.320ctルース(G, IF, 3Excellent)

[On Sale May 31st at 10 PM] Internally Flawless Diamond 4.4mm/0.320ct Loose (G, IF, 3Excellent) GIA Sale price¥89,800

[On sale May 31st at 10 PM] Malawi Bicolor Zircon (Malawi Zircon) 0.985 ct Loose Sale price¥39,800

[On sale May 30th at 10 PM] Mongolian Andesine 0.464ct Loose Stone Sale price¥9,800

【Available May 30th at 10 PM】Sugilite from South Africa, 0.786 ct Loose Stone Sale price¥12,800

[On sale June 12, 10 PM JST] Madagascar Padparadscha Sapphire 4.1mm/0.396ct Loose Stone DGL Certified Sale price¥52,800

Color change sapphire 0.473ct loose stone (purple sapphire) Sale price¥25,800

Madagascar Yellow Sapphire 4.4mm/0.417ct Loose Sale price¥14,800

【Sale Starts May 30th at 10 PM JST】Brazilian Seafoam Tourmaline 4.1mm/0.303ct Loose Stone Sale price¥16,800

[On sale May 30th at 10 PM] Brazilian Seafoam Tourmaline 4.2mm/0.319ct Loose Stone Sale price¥17,800

[On sale May 31, 10 PM JST] Brazilian Seafoam Tourmaline 4.1mm/0.280ct Loose Sale price¥15,800

[On sale June 6, 10 PM JST] Brazilian Seafoam Tourmaline 0.334ct Loose Stone Sale price¥16,800

[On sale May 31st, 10 PM] Madagascar Padparadscha Sapphire 5.0mm/0.560ct Loose Stone AIGS Sale price¥89,800

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） 0.556ctルース

[On sale May 30th at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.556ct Loose Stone Sale price¥8,800

[On Sale June 2nd, 10 PM JST] Mozambique Ruby 0.464ct Loose Gemstone with Identification Report Sale price¥29,800

[On sale June 13, 10 PM] Kochi Prefecture Blood Coral 5.779 ct Branch (Rough) Sale price¥8,800

Madagascar sphene 0.569ct loose stone Sale price¥6,980

Almandine Garnet 0.814ct Loose Stone Sale price¥7,980

Mozambique pink spinel 0.670ct loose stone Sale price¥22,800

American Peridot 0.339ct Loose Stone Sale price¥6,980

American Peridot 0.528ct Loose Stone Sale price¥8,800

Aquamarine 0.327ct loose stone Sale price¥9,800

Yellow sapphire 0.287ct loose stone Sale price¥8,800

Afghanite from Afghanistan 0.617ct loose stone Sale price¥69,800

Colombian Trapiche emerald 0.418ct rough stone Sale price¥39,800

[Sale on 5/24 at 10 PM] Sri Lankan Chrysoberyl Cat's Eye 4.1mm/0.490ct Loose Stone Sale price¥15,800

[On sale May 24th, 10 PM JST] Burmese Ice Jadeite 4.2mm/0.346ct Loose Stone Sale price¥8,800

Pink tourmaline 1.157ct loose stone Sale price¥12,800

Colombian emerald 0.512ct loose stone (silky type) Sale price¥12,800

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.