Cushion cut

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

[On sale June 7, 10 PM] Untreated Blue Sapphire 2.430ct Loose Gemstone GIA Sale price¥258,000

[On sale June 6th, 10 PM JST] Peruvian Gem Silica (Chrysocolla Chalcedony) 4.098ct Loose Stone with Japan-Germany Gemological Report Sale price¥24,800

[On sale June 6th at 10 PM JST] Peruvian Gem Silica (Chrysocolla Chalcedony) 3.210ct Loose Stone, GIA & JGGL Certified Sale price¥19,800

[Sale on June 6 at 10 PM] Malawi Moonstone (Malawi Moonstone) 2.209 ct loose stone Sale price¥15,800

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） 1.101ctルース

[On sale May 30th, 10 PM JST] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 6.0mm/1.101ct loose stone Sale price¥16,800

Romanesite in Quartz 4.825ct loose stone Sale price¥9,800

Brazilian Romanesite in Amethyst 7.083ct Loose Stone Sale price¥15,800

[On sale June 7th at 10 PM] Nepal Green Kyanite 0.764ct Loose Stone Sale price¥6,980

[On sale May 21st, 10 PM JST] Brazilian London Blue Topaz 5.978ct Loose Gemstone Sale price¥15,800

[On sale May 10th, 10 PM JST] Madagascar Andalusite 2.187ct Loose Stone Sale price¥32,800

[On sale May 9th, 10 PM JST] Turkish Color Change Diaspore 1.085ct Loose Gemstone Sale price¥18,800

【32501908掲載】ブラウンダイヤモンド 0.290ctルース(FANCY BROWN, SI-2)

Loose Brown Diamond 0.290ct (FANCY BROWN, SI-2) Sale price¥15,800

Spanish sphalerite 6.392 ct loose stone Sale price¥79,800

0.168ct Pakistan Vayrynenite Loose Gemstone Sale price¥35,800

モザンビーク産エルバイトトルマリン 1.456ctルース（CuO:0.1%,MnO:0.4%）

Elbaite tourmaline from Mozambique 1.456ct loose stone (CuO: 0.1%, MnO: 0.4%) Sale price¥45,800

カメレオンダイヤモンド 0.079ctルース(FANCY LIGHT GRAY GREEN, SI-1)

Green Diamond, Chameleon Diamond 0.079ct Loose Stone (FANCY LIGHT GRAY GREEN, SI-1) Sale price¥25,800

[On sale May 2nd, 10 PM JST] Sri Lankan Colorless Enstatite 1.877ct Loose Stone with Japan-Germany Gemological Report Sale price¥29,800

Lagoon Tourmaline from Afghanistan, 2.649 ct Loose Stone, Central Japan Gem Laboratory Sale price¥198,000

Zimbabwean Blue Apatite (UV type) 1.061ct loose stone Sale price¥11,000

Brazilian Medusa Quartz (Paraiba Quartz) 1.241ct Loose Stone Sale price¥6,980

Brazilian Medusa Quartz (Paraiba Quartz) 1.405ct Loose Stone Sale price¥8,800

Nigerian Cobalt Garnet 0.095ct Loose with Certificate Sale price¥18,800

【12561967掲載】ブラジル産デュモルチェライトインクォーツ 0.849ctルース

Brazilian Dumortierite in Quartz 0.849ct Loose Gemstone Sale price¥9,800

【12561959掲載】ブラジル産デュモルチェライトインクォーツ 0.690ctルース

Brazilian Dumortierite in Quartz 0.690ct Loose Stone (Faceted Cut) Sale price¥6,980

【12561954掲載】ブラジル産デュモルチェライトインクォーツ 3.009ctルース

Brazilian Dumortierite in Quartz 3.009ct Loose Stone Sale price¥29,800

Zambian bicolor tourmaline 4.142ct loose stone Sale price¥98,000

0.343 ct Tanzanite Loose Gemstone from Tanzania Sale price¥8,800

Pakistani vanadium sphene 0.759ct loose Sale price¥49,800

U.S. Oregon Sunstone 1.590ct Loose Stone Sale price¥15,800

Brazilian Indigolite Tourmaline 1.470ct Loose Stone with Certificate of Authenticity Sale price¥98,000

Pakistani Lazurite (Azurite) 0.171ct Loose Stone Sale price¥49,800

Brazilian green tourmaline 0.821ct loose stone Sale price¥12,800

Brazilian green tourmaline 3.102ct loose stone Sale price¥69,800

Zambian bicolor tourmaline 4.019ct loose stone Sale price¥98,000

Green sapphire 0.607ct loose stone Sale price¥12,800

1.547ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire) Sale price¥9,800

Tanzanian Almandine Garnet 0.885ct Loose Stone Sale price¥8,800

Namibian Jeremejevite 0.176ct Loose Stone with Certificate of Authenticity Sale price¥39,800

モザンビーク産パライバトルマリン 1.309ctルース（酸化鉄インクルージョン含む）

Paraiba tourmaline from Mozambique, 1.309ct loose stone (including iron oxide inclusions) Sale price¥98,000

Parasitic Peridot 0.292ct Loose Stone Sale price¥98,000

Zimbabwean Blue Apatite (UV type) 1.189ct loose stone Sale price¥12,800

Oligoclase Sunstone 6.432ct Loose Stone Sale price¥25,800

Brazilian Morganite 1.266ct loose stone Sale price¥29,800

[12559903] 2.991ct Brazilian Imperial Topaz Loose Stone Sale price¥158,000

Brazilian Aquamarine 0.463ct Loose Stone Sale price¥6,980

Tanzanian Rhodolite Garnet 0.643ct Loose Stone Sale price¥6,980

Tanzanian Rhodolite Garnet 0.511ct Loose Stone Sale price¥6,980

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.