Birthstone list

Sri Lankan Star Sapphire 2.093ct Loose Sale price¥8,800

Tanzanian pink tourmaline 0.558ct loose stone Sale price¥9,800

Brazilian pink tourmaline 0.968ct loose stone Sale price¥18,800

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

South African diamond rough (sawable) 0.085ct rough Sale price¥15,800

South African diamond rough (sawable) 0.110ct rough Sale price¥22,800

非加熱ブラジル産パライバトルマリン 0.065ctルース（CuO:1.6%、MnO:2.4%）

0.065ct loose Paraiba tourmaline from Brazil (CuO: 1.6%, MnO: 2.4%) Sale price¥49,800

[12551148] Australian black opal 3.890ct loose stone Sale price¥69,800

[12550851] 2.944ct Mozambique pink tourmaline loose stone Sale price¥39,800

[Available June 18th at 10 PM] [Colorful] K18WG Diamond 1.03ct Pendant Top Sale price¥128,000

[On Sale June 13th, 10 PM JST] Brazilian Santa Maria Aquamarine 0.215 ct Loose Stone with Appraisal Report Sale price¥15,800

[On sale June 17th, 10 PM] Tanzanian Tanzanite 0.372ct Loose Stone Sale price¥14,800

[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 18th at 10 PM] Madagascar Bi-Color Sapphire 3.7mm/0.271ct Loose Gemstone Sale price¥6,980

[On sale June 23rd, 10 PM JST] Colombian Trapiche Emerald 0.210ct Loose Stone Sale price¥39,800

[On sale July 24 at 10 PM] Mexican Fire Opal Loose Stone 0.729ct Sale price¥8,800

[On sale June 21st, 10 PM] Mexican Fire Opal Loose Stone 2.279ct Sale price¥15,800

【Sales begin on 6/21 at 10 PM】Mexican Fire Opal 1.857ct Loose Gemstone Sale price¥25,800

[Available June 21 at 10 PM] Botswana Rough Diamond (Sawable) 0.087ct Rough (Trigon) Sale price¥21,800

[On Sale 10 PM, June 14th] Botswana Rough Diamond (Sawable) 0.090ct (Trigon) Sale price¥22,800

[Available 6/18 10 PM JST] Botswana rough diamond (sawable) 0.118ct (trigon) Sale price¥29,800

【Sales start at 10 PM on June 21】Myanmar Leuco Garnet 0.108ct Loose Gemstone with Certificate Sale price¥22,800

[On Sale June 20th, 10 PM JST] Myanmar Leuco Garnet 0.128ct Loose Stone with Appraisal Report Sale price¥25,800

【Sales start: June 15, 10 PM JST】Almandine Garnet from Tanzania 0.938ct Loose Stone Sale price¥12,800

[On sale June 19, 10 PM] Colombian Trapiche Emerald 0.183ct Loose Stone Sale price¥39,800

[Sale on June 19th at 10 PM] Mozambican Elbaite Tourmaline/Pink Tourmaline 1.126 ct Loose Stone (CuO: 0.2%, MnO: 2.4%) Sale price¥55,800

[On sale June 21st at 10 PM] [Limited to 1 set] Amethyst & Citrine Symmetrical Pair Cut Set 66.58ct Loose Gemstones [Multiple Purchase Discount Available] Sale price¥29,800

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥18,800

Brazilian Green Tourmaline 2.218ct Loose Sale price¥25,800

Brazilian Blue Tourmaline 0.196ct Loose Sale price¥6,980

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

Vietnam Aquamarine 0.398ct Loose Sale price¥5,980

Brazilian Pink Tourmaline 0.862ct Loose Stone Sale price¥12,800

Sky blue topaz 1.719ct loose stone Sale price¥8,800

Brazilian Paraiba Tourmaline 0.052ct Loose Stone (CuO:2.0%, MnO:2.2%) Sale price¥35,800

Diamond (cabochon cut) 0.206ct loose Sale price¥45,800

[On sale June 26, 10 PM JST] Russian rough diamond (sawable) 0.148ct (trigon) Sale price¥49,800

[On sale June 23rd at 10 PM] Sierra Leone rough diamond (sawable) 0.089ct rough (trigon) Sale price¥27,800

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） 0.619ctルース

[On sale June 21st at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.619ct Loose Stone Sale price¥6,980

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） 0.807ctルース

[On sale June 26th, 10 PM JST] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 0.807ct Loose Sale price¥8,800

[Sale begins June 26th, 10 PM JST] Sri Lankan Silky Sapphire 5.1mm/0.488ct Loose Rose Cut Gemstone Sale price¥7,980

[On sale June 27, 10 PM] Colorful K18 Blue Sapphire and Diamond Ring with Certificate Sale price¥128,000

Madagascar sapphire 0.448ct loose stone Sale price¥15,800

Tanzanian green sapphire 0.303ct loose stone Sale price¥8,800

Nigerian bicolor tourmaline 0.379ct loose stone Sale price¥6,980

Brazilian Amethyst 9.749ct Loose Stone Sale price¥12,800

Mexican Fire Opal 0.593ct Loose (Faceted Cut) Sale price¥9,800

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.